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@ -127,15 +127,15 @@
| | Easy | Medium | Hard | Total |
|:--------:|:--------:|:--------:|:--------:|:--------:|
|Optimizing|35|33|21|89|
|Accepted|**282**|**375**|**112**|**769**|
|Total|490|984|394|1868|
|Perfection Rate|87.6%|91.2%|81.2%|88.4%|
|Completion Rate|57.6%|38.1%|28.4%|41.2%|
|Accepted|**283**|**376**|**111**|**770**|
|Total|490|985|393|1868|
|Perfection Rate|87.6%|91.2%|81.1%|88.4%|
|Completion Rate|57.8%|38.2%|28.2%|41.2%|
|------------|----------------------------|----------------------------|----------------------------|----------------------------|
## 二. 目录
以下已经收录了 680 道题的题解，还有 11 道题在尝试优化到 beats 100%
以下已经收录了 681 道题的题解，还有 11 道题在尝试优化到 beats 100%
| No. | Title | Solution | Acceptance | Difficulty | Frequency |
|:--------:|:--------------------------------------------------------------|:--------:|:--------:|:--------:|:--------:|
@ -237,7 +237,7 @@
|0096|Unique Binary Search Trees|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/0096.Unique-Binary-Search-Trees)|54.9%|Medium||
|0097|Interleaving String||33.0%|Medium||
|0098|Validate Binary Search Tree|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/0098.Validate-Binary-Search-Tree)|29.1%|Medium||
|0099|Recover Binary Search Tree|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/0099.Recover-Binary-Search-Tree)|43.1%|Hard||
|0099|Recover Binary Search Tree|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/0099.Recover-Binary-Search-Tree)|43.1%|Medium||
|0100|Same Tree|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/0100.Same-Tree)|54.4%|Easy||
|0101|Symmetric Tree|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/0101.Symmetric-Tree)|48.8%|Easy||
|0102|Binary Tree Level Order Traversal|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/0102.Binary-Tree-Level-Order-Traversal)|57.6%|Medium||
@ -311,7 +311,7 @@
|0170|Two Sum III - Data structure design||35.2%|Easy||
|0171|Excel Sheet Column Number|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/0171.Excel-Sheet-Column-Number)|57.4%|Easy||
|0172|Factorial Trailing Zeroes|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/0172.Factorial-Trailing-Zeroes)|39.0%|Easy||
|0173|Binary Search Tree Iterator|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/0173.Binary-Search-Tree-Iterator)|61.1%|Medium||
|0173|Binary Search Tree Iterator|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/0173.Binary-Search-Tree-Iterator)|61.2%|Medium||
|0174|Dungeon Game|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/0174.Dungeon-Game)|33.6%|Hard||
|0175|Combine Two Tables||65.3%|Easy||
|0176|Second Highest Salary||33.8%|Easy||
@ -809,7 +809,7 @@
|0668|Kth Smallest Number in Multiplication Table|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/0668.Kth-Smallest-Number-in-Multiplication-Table)|48.1%|Hard||
|0669|Trim a Binary Search Tree|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/0669.Trim-a-Binary-Search-Tree)|64.4%|Medium||
|0670|Maximum Swap||45.4%|Medium||
|0671|Second Minimum Node In a Binary Tree||42.9%|Easy||
|0671|Second Minimum Node In a Binary Tree||42.8%|Easy||
|0672|Bulb Switcher II||51.1%|Medium||
|0673|Number of Longest Increasing Subsequence||38.8%|Medium||
|0674|Longest Continuous Increasing Subsequence|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/0674.Longest-Continuous-Increasing-Subsequence)|46.1%|Easy||
@ -826,7 +826,7 @@
|0685|Redundant Connection II|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/0685.Redundant-Connection-II)|33.2%|Hard||
|0686|Repeated String Match||32.9%|Medium||
|0687|Longest Univalue Path||37.8%|Medium||
|0688|Knight Probability in Chessboard||50.4%|Medium||
|0688|Knight Probability in Chessboard||50.5%|Medium||
|0689|Maximum Sum of 3 Non-Overlapping Subarrays||47.5%|Hard||
|0690|Employee Importance|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/0690.Employee-Importance)|59.3%|Easy||
|0691|Stickers to Spell Word||45.6%|Hard||
@ -841,7 +841,7 @@
|0700|Search in a Binary Search Tree||73.6%|Easy||
|0701|Insert into a Binary Search Tree||75.2%|Medium||
|0702|Search in a Sorted Array of Unknown Size||69.2%|Medium||
|0703|Kth Largest Element in a Stream|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/0703.Kth-Largest-Element-in-a-Stream)|51.1%|Easy||
|0703|Kth Largest Element in a Stream|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/0703.Kth-Largest-Element-in-a-Stream)|51.2%|Easy||
|0704|Binary Search|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/0704.Binary-Search)|54.5%|Easy||
|0705|Design HashSet|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/0705.Design-HashSet)|64.4%|Easy||
|0706|Design HashMap|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/0706.Design-HashMap)|64.0%|Easy||
@ -989,7 +989,7 @@
|0848|Shifting Letters||45.1%|Medium||
|0849|Maximize Distance to Closest Person||44.6%|Medium||
|0850|Rectangle Area II|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/0850.Rectangle-Area-II)|48.5%|Hard||
|0851|Loud and Rich|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/0851.Loud-and-Rich)|53.1%|Medium||
|0851|Loud and Rich|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/0851.Loud-and-Rich)|53.0%|Medium||
|0852|Peak Index in a Mountain Array|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/0852.Peak-Index-in-a-Mountain-Array)|71.7%|Easy||
|0853|Car Fleet|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/0853.Car-Fleet)|44.7%|Medium||
|0854|K-Similar Strings||38.7%|Hard||
@ -1041,7 +1041,7 @@
|0900|RLE Iterator||56.1%|Medium||
|0901|Online Stock Span|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/0901.Online-Stock-Span)|61.7%|Medium||
|0902|Numbers At Most N Given Digit Set||36.1%|Hard||
|0903|Valid Permutations for DI Sequence||55.6%|Hard||
|0903|Valid Permutations for DI Sequence||55.7%|Hard||
|0904|Fruit Into Baskets|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/0904.Fruit-Into-Baskets)|43.1%|Medium||
|0905|Sort Array By Parity||75.0%|Easy||
|0906|Super Palindromes||39.1%|Hard||
@ -1117,7 +1117,7 @@
|0976|Largest Perimeter Triangle|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/0976.Largest-Perimeter-Triangle)|59.5%|Easy||
|0977|Squares of a Sorted Array|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/0977.Squares-of-a-Sorted-Array)|71.7%|Easy||
|0978|Longest Turbulent Subarray|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/0978.Longest-Turbulent-Subarray)|46.7%|Medium||
|0979|Distribute Coins in Binary Tree|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/0979.Distribute-Coins-in-Binary-Tree)|70.1%|Medium||
|0979|Distribute Coins in Binary Tree|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/0979.Distribute-Coins-in-Binary-Tree)|70.0%|Medium||
|0980|Unique Paths III|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/0980.Unique-Paths-III)|77.1%|Hard||
|0981|Time Based Key-Value Store|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/0981.Time-Based-Key-Value-Store)|54.4%|Medium||
|0982|Triples with Bitwise AND Equal To Zero||56.7%|Hard||
@ -1128,7 +1128,7 @@
|0987|Vertical Order Traversal of a Binary Tree|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/0987.Vertical-Order-Traversal-of-a-Binary-Tree)|39.2%|Hard||
|0988|Smallest String Starting From Leaf||47.1%|Medium||
|0989|Add to Array-Form of Integer|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/0989.Add-to-Array-Form-of-Integer)|44.9%|Easy||
|0990|Satisfiability of Equality Equations|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/0990.Satisfiability-of-Equality-Equations)|47.1%|Medium||
|0990|Satisfiability of Equality Equations|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/0990.Satisfiability-of-Equality-Equations)|47.2%|Medium||
|0991|Broken Calculator|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/0991.Broken-Calculator)|49.8%|Medium||
|0992|Subarrays with K Different Integers|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/0992.Subarrays-with-K-Different-Integers)|51.2%|Hard||
|0993|Cousins in Binary Tree|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/0993.Cousins-in-Binary-Tree)|52.3%|Easy||
@ -1292,7 +1292,7 @@
|1151|Minimum Swaps to Group All 1's Together||58.9%|Medium||
|1152|Analyze User Website Visit Pattern||43.0%|Medium||
|1153|String Transforms Into Another String||35.7%|Hard||
|1154|Day of the Year|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/1154.Day-of-the-Year)|49.4%|Easy||
|1154|Day of the Year|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/1154.Day-of-the-Year)|49.3%|Easy||
|1155|Number of Dice Rolls With Target Sum||47.6%|Medium||
|1156|Swap For Longest Repeated Character Substring||47.0%|Medium||
|1157|Online Majority Element In Subarray|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/1157.Online-Majority-Element-In-Subarray)|40.9%|Hard||
@ -1344,7 +1344,7 @@
|1203|Sort Items by Groups Respecting Dependencies|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/1203.Sort-Items-by-Groups-Respecting-Dependencies)|48.5%|Hard||
|1204|Last Person to Fit in the Elevator||72.2%|Medium||
|1205|Monthly Transactions II||45.7%|Medium||
|1206|Design Skiplist||58.9%|Hard||
|1206|Design Skiplist||59.0%|Hard||
|1207|Unique Number of Occurrences|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/1207.Unique-Number-of-Occurrences)|72.1%|Easy||
|1208|Get Equal Substrings Within Budget|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/1208.Get-Equal-Substrings-Within-Budget)|44.5%|Medium||
|1209|Remove All Adjacent Duplicates in String II|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/1209.Remove-All-Adjacent-Duplicates-in-String-II)|57.4%|Medium||
@ -1432,7 +1432,7 @@
|1291|Sequential Digits||57.4%|Medium||
|1292|Maximum Side Length of a Square with Sum Less than or Equal to Threshold||50.9%|Medium||
|1293|Shortest Path in a Grid with Obstacles Elimination||43.0%|Hard||
|1294|Weather Type in Each Country||66.7%|Easy||
|1294|Weather Type in Each Country||66.8%|Easy||
|1295|Find Numbers with Even Number of Digits|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/1295.Find-Numbers-with-Even-Number-of-Digits)|78.5%|Easy||
|1296|Divide Array in Sets of K Consecutive Numbers||55.8%|Medium||
|1297|Maximum Number of Occurrences of a Substring||51.1%|Medium||
@ -1471,7 +1471,7 @@
|1330|Reverse Subarray To Maximize Array Value||37.0%|Hard||
|1331|Rank Transform of an Array||57.3%|Easy||
|1332|Remove Palindromic Subsequences|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/1332.Remove-Palindromic-Subsequences)|68.5%|Easy||
|1333|Filter Restaurants by Vegan-Friendly, Price and Distance||57.6%|Medium||
|1333|Filter Restaurants by Vegan-Friendly, Price and Distance||57.7%|Medium||
|1334|Find the City With the Smallest Number of Neighbors at a Threshold Distance||47.6%|Medium||
|1335|Minimum Difficulty of a Job Schedule||56.5%|Hard||
|1336|Number of Transactions per Visit||49.9%|Hard||
@ -1487,7 +1487,7 @@
|1346|Check If N and Its Double Exist||35.8%|Easy||
|1347|Minimum Number of Steps to Make Two Strings Anagram||75.1%|Medium||
|1348|Tweet Counts Per Frequency||38.2%|Medium||
|1349|Maximum Students Taking Exam||44.7%|Hard||
|1349|Maximum Students Taking Exam||44.6%|Hard||
|1350|Students With Invalid Departments||90.4%|Easy||
|1351|Count Negative Numbers in a Sorted Matrix||75.7%|Easy||
|1352|Product of the Last K Numbers||45.5%|Medium||
@ -1710,7 +1710,7 @@
|1569|Number of Ways to Reorder Array to Get Same BST||50.2%|Hard||
|1570|Dot Product of Two Sparse Vectors||91.0%|Medium||
|1571|Warehouse Manager||89.7%|Easy||
|1572|Matrix Diagonal Sum||77.8%|Easy||
|1572|Matrix Diagonal Sum|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/1572.Matrix-Diagonal-Sum)|77.8%|Easy||
|1573|Number of Ways to Split a String|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/1573.Number-of-Ways-to-Split-a-String)|31.4%|Medium||
|1574|Shortest Subarray to be Removed to Make Array Sorted||34.2%|Medium||
|1575|Count All Possible Routes||57.3%|Hard||
@ -1718,12 +1718,12 @@
|1577|Number of Ways Where Square of Number Is Equal to Product of Two Numbers||38.0%|Medium||
|1578|Minimum Deletion Cost to Avoid Repeating Letters||60.8%|Medium||
|1579|Remove Max Number of Edges to Keep Graph Fully Traversable|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/1579.Remove-Max-Number-of-Edges-to-Keep-Graph-Fully-Traversable)|46.5%|Hard||
|1580|Put Boxes Into the Warehouse II||63.3%|Medium||
|1580|Put Boxes Into the Warehouse II||63.2%|Medium||
|1581|Customer Who Visited but Did Not Make Any Transactions||89.4%|Easy||
|1582|Special Positions in a Binary Matrix||64.1%|Easy||
|1583|Count Unhappy Friends||55.3%|Medium||
|1584|Min Cost to Connect All Points||54.2%|Medium||
|1585|Check If String Is Transformable With Substring Sort Operations||48.4%|Hard||
|1585|Check If String Is Transformable With Substring Sort Operations||48.5%|Hard||
|1586|Binary Search Tree Iterator II||66.5%|Medium||
|1587|Bank Account Summary II||89.9%|Easy||
|1588|Sum of All Odd Length Subarrays||81.8%|Easy||
@ -1775,7 +1775,7 @@
|1634|Add Two Polynomials Represented as Linked Lists||53.1%|Medium||
|1635|Hopper Company Queries I||56.5%|Hard||
|1636|Sort Array by Increasing Frequency|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/1636.Sort-Array-by-Increasing-Frequency)|67.1%|Easy||
|1637|Widest Vertical Area Between Two Points Containing No Points||83.9%|Medium||
|1637|Widest Vertical Area Between Two Points Containing No Points||83.8%|Medium||
|1638|Count Substrings That Differ by One Character||70.8%|Medium||
|1639|Number of Ways to Form a Target String Given a Dictionary||40.4%|Hard||
|1640|Check Array Formation Through Concatenation|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/1640.Check-Array-Formation-Through-Concatenation)|59.6%|Easy||
@ -1789,7 +1789,7 @@
|1648|Sell Diminishing-Valued Colored Balls|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/1648.Sell-Diminishing-Valued-Colored-Balls)|30.8%|Medium||
|1649|Create Sorted Array through Instructions|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/1649.Create-Sorted-Array-through-Instructions)|36.8%|Hard||
|1650|Lowest Common Ancestor of a Binary Tree III||76.5%|Medium||
|1651|Hopper Company Queries III||66.2%|Hard||
|1651|Hopper Company Queries III||66.3%|Hard||
|1652|Defuse the Bomb|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/1652.Defuse-the-Bomb)|61.0%|Easy||
|1653|Minimum Deletions to Make String Balanced|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/1653.Minimum-Deletions-to-Make-String-Balanced)|52.2%|Medium||
|1654|Minimum Jumps to Reach Home|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/1654.Minimum-Jumps-to-Reach-Home)|24.6%|Medium||
@ -1823,7 +1823,7 @@
|1682|Longest Palindromic Subsequence II||52.0%|Medium||
|1683|Invalid Tweets||91.1%|Easy||
|1684|Count the Number of Consistent Strings|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/1684.Count-the-Number-of-Consistent-Strings)|81.7%|Easy||
|1685|Sum of Absolute Differences in a Sorted Array|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/1685.Sum-of-Absolute-Differences-in-a-Sorted-Array)|63.4%|Medium||
|1685|Sum of Absolute Differences in a Sorted Array|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/1685.Sum-of-Absolute-Differences-in-a-Sorted-Array)|63.3%|Medium||
|1686|Stone Game VI||50.4%|Medium||
|1687|Delivering Boxes from Storage to Ports||35.8%|Hard||
|1688|Count of Matches in Tournament|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/1688.Count-of-Matches-in-Tournament)|81.5%|Easy||
@ -1836,7 +1836,7 @@
|1695|Maximum Erasure Value|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/1695.Maximum-Erasure-Value)|49.3%|Medium||
|1696|Jump Game VI|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/1696.Jump-Game-VI)|50.5%|Medium||
|1697|Checking Existence of Edge Length Limited Paths||54.4%|Hard||
|1698|Number of Distinct Substrings in a String||61.0%|Medium||
|1698|Number of Distinct Substrings in a String||60.9%|Medium||
|1699|Number of Calls Between Two Persons||86.1%|Medium||
|1700|Number of Students Unable to Eat Lunch|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/1700.Number-of-Students-Unable-to-Eat-Lunch)|67.6%|Easy||
|1701|Average Waiting Time||61.2%|Medium||
@ -1848,7 +1848,7 @@
|1707|Maximum XOR With an Element From Array||46.4%|Hard||
|1708|Largest Subarray Length K||63.3%|Easy||
|1709|Biggest Window Between Visits||81.7%|Medium||
|1710|Maximum Units on a Truck|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/1710.Maximum-Units-on-a-Truck)|69.9%|Easy||
|1710|Maximum Units on a Truck|[Go](https://github.com/halfrost/LeetCode-Go/tree/master/leetcode/1710.Maximum-Units-on-a-Truck)|70.0%|Easy||
|1711|Count Good Meals||26.7%|Medium||
|1712|Ways to Split Array Into Three Subarrays||29.2%|Medium||
|1713|Minimum Operations to Make a Subsequence||45.7%|Hard||
@ -1901,7 +1901,7 @@
|1760|Minimum Limit of Balls in a Bag||53.4%|Medium||
|1761|Minimum Degree of a Connected Trio in a Graph||38.0%|Hard||
|1762|Buildings With an Ocean View||81.3%|Medium||
|1763|Longest Nice Substring||61.4%|Easy||
|1763|Longest Nice Substring||61.3%|Easy||
|1764|Form Array by Concatenating Subarrays of Another Array||54.0%|Medium||
|1765|Map of Highest Peak||56.5%|Medium||
|1766|Tree of Coprimes||36.3%|Hard||
@ -1916,7 +1916,7 @@
|1775|Equal Sum Arrays With Minimum Number of Operations||50.6%|Medium||
|1776|Car Fleet II||48.7%|Hard||
|1777|Product's Price for Each Store||86.3%|Easy||
|1778|Shortest Path in a Hidden Grid||44.0%|Medium||
|1778|Shortest Path in a Hidden Grid||43.9%|Medium||
|1779|Find Nearest Point That Has the Same X or Y Coordinate||66.9%|Easy||
|1780|Check if Number is a Sum of Powers of Three||63.2%|Medium||
|1781|Sum of Beauty of All Substrings||58.3%|Medium||
@ -1955,7 +1955,7 @@
|1814|Count Nice Pairs in an Array||39.0%|Medium||
|1815|Maximum Number of Groups Getting Fresh Donuts||39.4%|Hard||
|1816|Truncate Sentence||79.5%|Easy||
|1817|Finding the Users Active Minutes||78.5%|Medium||
|1817|Finding the Users Active Minutes||78.4%|Medium||
|1818|Minimum Absolute Sum Difference||40.4%|Medium||
|1819|Number of Different Subsequences GCDs||33.9%|Hard||
|1820|Maximum Number of Accepted Invitations||48.5%|Medium||
@ -1978,20 +1978,20 @@
|1837|Sum of Digits in Base K||74.7%|Easy||
|1838|Frequency of the Most Frequent Element||38.1%|Medium||
|1839|Longest Substring Of All Vowels in Order||61.4%|Medium||
|1840|Maximum Building Height||37.2%|Hard||
|1840|Maximum Building Height||37.1%|Hard||
|1841|League Statistics||65.9%|Medium||
|1842|Next Palindrome Using Same Digits||64.3%|Hard||
|1843|Suspicious Bank Accounts||52.4%|Medium||
|1844|Replace All Digits with Characters||81.1%|Easy||
|1842|Next Palindrome Using Same Digits||64.1%|Hard||
|1843|Suspicious Bank Accounts||52.5%|Medium||
|1844|Replace All Digits with Characters||81.2%|Easy||
|1845|Seat Reservation Manager||80.3%|Medium||
|1846|Maximum Element After Decreasing and Rearranging||53.9%|Medium||
|1847|Closest Room||36.0%|Hard||
|1848|Minimum Distance to the Target Element||60.7%|Easy||
|1848|Minimum Distance to the Target Element||60.8%|Easy||
|1849|Splitting a String Into Descending Consecutive Values||34.5%|Medium||
|1850|Minimum Adjacent Swaps to Reach the Kth Smallest Number||62.8%|Medium||
|1851|Minimum Interval to Include Each Query||41.5%|Hard||
|1852|Distinct Numbers in Each Subarray||78.6%|Medium||
|1853|Convert Date Format||87.7%|Easy||
|1853|Convert Date Format||87.6%|Easy||
|1854|Maximum Population Year||77.4%|Easy||
|1855|Maximum Distance Between a Pair of Values||60.7%|Medium||
|1856|Maximum Subarray Min-Product||38.1%|Medium||
@ -2001,9 +2001,9 @@
|1860|Incremental Memory Leak||68.9%|Medium||
|1861|Rotating the Box||60.8%|Medium||
|1862|Sum of Floored Pairs||32.7%|Hard||
|1863|Sum of All Subset XOR Totals||121.0%|Easy||
|1863|Sum of All Subset XOR Totals||120.7%|Easy||
|1864|Minimum Number of Swaps to Make the Binary String Alternating||34.8%|Medium||
|1865|Finding Pairs With a Certain Sum||78.7%|Medium||
|1865|Finding Pairs With a Certain Sum||78.6%|Medium||
|1866|Number of Ways to Rearrange Sticks With K Sticks Visible||53.0%|Hard||
|1867|Orders With Maximum Quantity Above Average||80.5%|Medium||
|1868|Product of Two Run-Length Encoded Arrays||65.4%|Medium||

41
leetcode/1572.Matrix-Diagonal-Sum/README.md
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@ -1,31 +1,35 @@
# [1572. Matrix Diagonal Sum](https://leetcode-cn.com/problems/matrix-diagonal-sum/)
# [1572. Matrix Diagonal Sum](https://leetcode.com/problems/matrix-diagonal-sum/)
## 题目
Given a square matrix mat, return the sum of the matrix diagonals.
Given a square matrix `mat`, return the sum of the matrix diagonals.
Only include the sum of all the elements on the primary diagonal and all the elements on the secondary diagonal that are not part of the primary diagonal.
**Example 1:**
![https://assets.leetcode.com/uploads/2020/08/14/sample_1911.png](https://assets.leetcode.com/uploads/2020/08/14/sample_1911.png)
```
Input: mat = [[1,2,3],
[4,5,6],
[7,8,9]]
  [4,5,6],
  [7,8,9]]
Output: 25
Explanation: Diagonals sum: 1 + 5 + 9 + 3 + 7 = 25
Explanation:Diagonals sum: 1 + 5 + 9 + 3 + 7 = 25
Notice that element mat[1][1] = 5 is counted only once.
```
**Example 2:**
```
Input: mat = [[1,1,1,1],
[1,1,1,1],
[1,1,1,1],
[1,1,1,1]]
  [1,1,1,1],
  [1,1,1,1],
  [1,1,1,1]]
Output: 8
```
**Example 3:**
@ -33,24 +37,23 @@ Output: 8
```
Input: mat = [[5]]
Output: 5
```
**Constraints:**
- n == mat.length == mat[i].length
- 1 <= n <= 100
- 1 <= mat[i][j] <= 100
- `n == mat.length == mat[i].length`
- `1 <= n <= 100`
- `1 <= mat[i][j] <= 100`
## 题目大意
给你一个正方形矩阵 mat，请你返回矩阵对角线元素的和。
请你返回在矩阵主对角线上的元素和副对角线上且不在主对角线上元素的和
给你一个正方形矩阵 mat，请你返回矩阵对角线元素的和。请你返回在矩阵主对角线上的元素和副对角线上且不在主对角线上元素的和。
## 解题思路
- 根据题意,把主对角线和副对角线上的元素相加
- 如果正方形矩阵的长度n为奇数，相加的结果需要减去mat[n/2][n/2]
- 简单题。根据题意，把主对角线和副对角线上的元素相加。
- 如果正方形矩阵的长度 n 为奇数，相加的结果需要减去 mat[n/2][n/2]。
## 代码
@ -63,12 +66,12 @@ func diagonalSum(mat [][]int) int {
for pi := 0; pi < n; pi++ {
ans += mat[pi][pi]
}
for si, sj := n - 1, 0; sj < n; si, sj = si - 1, sj + 1 {
for si, sj := n-1, 0; sj < n; si, sj = si-1, sj+1 {
ans += mat[si][sj]
}
if n % 2 == 0 {
if n%2 == 0 {
return ans
}
return ans - mat[n / 2][n / 2]
return ans - mat[n/2][n/2]
}
```

2
website/content/ChapterFour/1500~1599/1551.Minimum-Operations-to-Make-Array-Equal.md
View File

@ -65,5 +65,5 @@ func minOperations(n int) int {
----------------------------------------------
<div style="display: flex;justify-content: space-between;align-items: center;">
<p><a href="https://books.halfrost.com/leetcode/ChapterFour/1500~1599/1539.Kth-Missing-Positive-Number/">⬅️上一页</a></p>
<p><a href="https://books.halfrost.com/leetcode/ChapterFour/1500~1599/1573.Number-of-Ways-to-Split-a-String/">下一页➡️</a></p>
<p><a href="https://books.halfrost.com/leetcode/ChapterFour/1500~1599/1572.Matrix-Diagonal-Sum/">下一页➡️</a></p>
</div>

84
website/content/ChapterFour/1500~1599/1572.Matrix-Diagonal-Sum.md Normal file
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@ -0,0 +1,84 @@
# [1572. Matrix Diagonal Sum](https://leetcode.com/problems/matrix-diagonal-sum/)
## 题目
Given a square matrix `mat`, return the sum of the matrix diagonals.
Only include the sum of all the elements on the primary diagonal and all the elements on the secondary diagonal that are not part of the primary diagonal.
**Example 1:**
![https://assets.leetcode.com/uploads/2020/08/14/sample_1911.png](https://assets.leetcode.com/uploads/2020/08/14/sample_1911.png)
```
Input: mat = [[1,2,3],
  [4,5,6],
  [7,8,9]]
Output: 25
Explanation:Diagonals sum: 1 + 5 + 9 + 3 + 7 = 25
Notice that element mat[1][1] = 5 is counted only once.
```
**Example 2:**
```
Input: mat = [[1,1,1,1],
  [1,1,1,1],
  [1,1,1,1],
  [1,1,1,1]]
Output: 8
```
**Example 3:**
```
Input: mat = [[5]]
Output: 5
```
**Constraints:**
- `n == mat.length == mat[i].length`
- `1 <= n <= 100`
- `1 <= mat[i][j] <= 100`
## 题目大意
给你一个正方形矩阵 mat，请你返回矩阵对角线元素的和。请你返回在矩阵主对角线上的元素和副对角线上且不在主对角线上元素的和。
## 解题思路
- 简单题。根据题意，把主对角线和副对角线上的元素相加。
- 如果正方形矩阵的长度 n 为奇数，相加的结果需要减去 mat[n/2][n/2]。
## 代码
```go
package leetcode
func diagonalSum(mat [][]int) int {
n := len(mat)
ans := 0
for pi := 0; pi < n; pi++ {
ans += mat[pi][pi]
}
for si, sj := n-1, 0; sj < n; si, sj = si-1, sj+1 {
ans += mat[si][sj]
}
if n%2 == 0 {
return ans
}
return ans - mat[n/2][n/2]
}
```
----------------------------------------------
<div style="display: flex;justify-content: space-between;align-items: center;">
<p><a href="https://books.halfrost.com/leetcode/ChapterFour/1500~1599/1551.Minimum-Operations-to-Make-Array-Equal/">⬅️上一页</a></p>
<p><a href="https://books.halfrost.com/leetcode/ChapterFour/1500~1599/1573.Number-of-Ways-to-Split-a-String/">下一页➡️</a></p>
</div>

2
website/content/ChapterFour/1500~1599/1573.Number-of-Ways-to-Split-a-String.md
View File

@ -110,6 +110,6 @@ func numWays(s string) int {
----------------------------------------------
<div style="display: flex;justify-content: space-between;align-items: center;">
<p><a href="https://books.halfrost.com/leetcode/ChapterFour/1500~1599/1551.Minimum-Operations-to-Make-Array-Equal/">⬅️上一页</a></p>
<p><a href="https://books.halfrost.com/leetcode/ChapterFour/1500~1599/1572.Matrix-Diagonal-Sum/">⬅️上一页</a></p>
<p><a href="https://books.halfrost.com/leetcode/ChapterFour/1500~1599/1579.Remove-Max-Number-of-Edges-to-Keep-Graph-Fully-Traversable/">下一页➡️</a></p>
</div>

1
website/content/ChapterTwo/Array.md
View File

@ -162,6 +162,7 @@ weight: 1
|1486|XOR Operation in an Array|[Go]({{< relref "/ChapterFour/1400~1499/1486.XOR-Operation-in-an-Array.md" >}})|Easy||||83.9%|
|1512|Number of Good Pairs|[Go]({{< relref "/ChapterFour/1500~1599/1512.Number-of-Good-Pairs.md" >}})|Easy||||87.6%|
|1539|Kth Missing Positive Number|[Go]({{< relref "/ChapterFour/1500~1599/1539.Kth-Missing-Positive-Number.md" >}})|Easy||||54.7%|
|1572|Matrix Diagonal Sum|[Go]({{< relref "/ChapterFour/1500~1599/1572.Matrix-Diagonal-Sum.md" >}})|Easy||||77.8%|
|1608|Special Array With X Elements Greater Than or Equal X|[Go]({{< relref "/ChapterFour/1600~1699/1608.Special-Array-With-X-Elements-Greater-Than-or-Equal-X.md" >}})|Easy||||61.3%|
|1619|Mean of Array After Removing Some Elements|[Go]({{< relref "/ChapterFour/1600~1699/1619.Mean-of-Array-After-Removing-Some-Elements.md" >}})|Easy||||64.4%|
|1629|Slowest Key|[Go]({{< relref "/ChapterFour/1600~1699/1629.Slowest-Key.md" >}})|Easy||||58.9%|

2
website/content/ChapterTwo/Binary_Search.md
View File

@ -198,7 +198,7 @@ func peakIndexInMountainArray(A []int) int {
|1337|The K Weakest Rows in a Matrix|[Go]({{< relref "/ChapterFour/1300~1399/1337.The-K-Weakest-Rows-in-a-Matrix.md" >}})|Easy||||72.0%|
|1482|Minimum Number of Days to Make m Bouquets|[Go]({{< relref "/ChapterFour/1400~1499/1482.Minimum-Number-of-Days-to-Make-m-Bouquets.md" >}})|Medium||||51.5%|
|1631|Path With Minimum Effort|[Go]({{< relref "/ChapterFour/1600~1699/1631.Path-With-Minimum-Effort.md" >}})|Medium||||50.0%|
|1642|Furthest Building You Can Reach|[Go]({{< relref "/ChapterFour/1600~1699/1642.Furthest-Building-You-Can-Reach.md" >}})|Medium||||46.8%|
|1642|Furthest Building You Can Reach|[Go]({{< relref "/ChapterFour/1600~1699/1642.Furthest-Building-You-Can-Reach.md" >}})|Medium||||46.7%|
|1649|Create Sorted Array through Instructions|[Go]({{< relref "/ChapterFour/1600~1699/1649.Create-Sorted-Array-through-Instructions.md" >}})|Hard||||36.8%|
|1658|Minimum Operations to Reduce X to Zero|[Go]({{< relref "/ChapterFour/1600~1699/1658.Minimum-Operations-to-Reduce-X-to-Zero.md" >}})|Medium||||33.4%|
|------------|-------------------------------------------------------|-------| ----------------| ---------------|-------------|-------------|-------------|

6
website/content/ChapterTwo/Depth_First_Search.md
View File

@ -11,7 +11,7 @@ weight: 9
|:--------:|:------- | :--------: | :----------: | :----: | :-----: | :-----: |:-----: |
|0017|Letter Combinations of a Phone Number|[Go]({{< relref "/ChapterFour/0001~0099/0017.Letter-Combinations-of-a-Phone-Number.md" >}})|Medium||||50.3%|
|0098|Validate Binary Search Tree|[Go]({{< relref "/ChapterFour/0001~0099/0098.Validate-Binary-Search-Tree.md" >}})|Medium| O(n)| O(1)||29.1%|
|0099|Recover Binary Search Tree|[Go]({{< relref "/ChapterFour/0001~0099/0099.Recover-Binary-Search-Tree.md" >}})|Hard| O(n)| O(1)||43.1%|
|0099|Recover Binary Search Tree|[Go]({{< relref "/ChapterFour/0001~0099/0099.Recover-Binary-Search-Tree.md" >}})|Medium| O(n)| O(1)||43.1%|
|0100|Same Tree|[Go]({{< relref "/ChapterFour/0100~0199/0100.Same-Tree.md" >}})|Easy| O(n)| O(1)||54.4%|
|0101|Symmetric Tree|[Go]({{< relref "/ChapterFour/0100~0199/0101.Symmetric-Tree.md" >}})|Easy| O(n)| O(1)||48.8%|
|0104|Maximum Depth of Binary Tree|[Go]({{< relref "/ChapterFour/0100~0199/0104.Maximum-Depth-of-Binary-Tree.md" >}})|Easy| O(n)| O(1)||68.7%|
@ -63,7 +63,7 @@ weight: 9
|0834|Sum of Distances in Tree|[Go]({{< relref "/ChapterFour/0800~0899/0834.Sum-of-Distances-in-Tree.md" >}})|Hard||||47.0%|
|0839|Similar String Groups|[Go]({{< relref "/ChapterFour/0800~0899/0839.Similar-String-Groups.md" >}})|Hard||||42.2%|
|0841|Keys and Rooms|[Go]({{< relref "/ChapterFour/0800~0899/0841.Keys-and-Rooms.md" >}})|Medium||||66.7%|
|0851|Loud and Rich|[Go]({{< relref "/ChapterFour/0800~0899/0851.Loud-and-Rich.md" >}})|Medium||||53.1%|
|0851|Loud and Rich|[Go]({{< relref "/ChapterFour/0800~0899/0851.Loud-and-Rich.md" >}})|Medium||||53.0%|
|0863|All Nodes Distance K in Binary Tree|[Go]({{< relref "/ChapterFour/0800~0899/0863.All-Nodes-Distance-K-in-Binary-Tree.md" >}})|Medium||||58.5%|
|0872|Leaf-Similar Trees|[Go]({{< relref "/ChapterFour/0800~0899/0872.Leaf-Similar-Trees.md" >}})|Easy||||64.5%|
|0897|Increasing Order Search Tree|[Go]({{< relref "/ChapterFour/0800~0899/0897.Increasing-Order-Search-Tree.md" >}})|Easy||||74.8%|
@ -74,7 +74,7 @@ weight: 9
|0959|Regions Cut By Slashes|[Go]({{< relref "/ChapterFour/0900~0999/0959.Regions-Cut-By-Slashes.md" >}})|Medium||||67.4%|
|0968|Binary Tree Cameras|[Go]({{< relref "/ChapterFour/0900~0999/0968.Binary-Tree-Cameras.md" >}})|Hard||||40.5%|
|0971|Flip Binary Tree To Match Preorder Traversal|[Go]({{< relref "/ChapterFour/0900~0999/0971.Flip-Binary-Tree-To-Match-Preorder-Traversal.md" >}})|Medium||||50.0%|
|0979|Distribute Coins in Binary Tree|[Go]({{< relref "/ChapterFour/0900~0999/0979.Distribute-Coins-in-Binary-Tree.md" >}})|Medium||||70.1%|
|0979|Distribute Coins in Binary Tree|[Go]({{< relref "/ChapterFour/0900~0999/0979.Distribute-Coins-in-Binary-Tree.md" >}})|Medium||||70.0%|
|0980|Unique Paths III|[Go]({{< relref "/ChapterFour/0900~0999/0980.Unique-Paths-III.md" >}})|Hard| O(n log n)| O(n)||77.1%|
|0987|Vertical Order Traversal of a Binary Tree|[Go]({{< relref "/ChapterFour/0900~0999/0987.Vertical-Order-Traversal-of-a-Binary-Tree.md" >}})|Hard||||39.2%|
|1020|Number of Enclaves|[Go]({{< relref "/ChapterFour/1000~1099/1020.Number-of-Enclaves.md" >}})|Medium||||59.4%|

2
website/content/ChapterTwo/Math.md
View File

@ -95,7 +95,7 @@ weight: 12
|1641|Count Sorted Vowel Strings|[Go]({{< relref "/ChapterFour/1600~1699/1641.Count-Sorted-Vowel-Strings.md" >}})|Medium||||75.2%|
|1648|Sell Diminishing-Valued Colored Balls|[Go]({{< relref "/ChapterFour/1600~1699/1648.Sell-Diminishing-Valued-Colored-Balls.md" >}})|Medium||||30.8%|
|1680|Concatenation of Consecutive Binary Numbers|[Go]({{< relref "/ChapterFour/1600~1699/1680.Concatenation-of-Consecutive-Binary-Numbers.md" >}})|Medium||||52.3%|
|1685|Sum of Absolute Differences in a Sorted Array|[Go]({{< relref "/ChapterFour/1600~1699/1685.Sum-of-Absolute-Differences-in-a-Sorted-Array.md" >}})|Medium||||63.4%|
|1685|Sum of Absolute Differences in a Sorted Array|[Go]({{< relref "/ChapterFour/1600~1699/1685.Sum-of-Absolute-Differences-in-a-Sorted-Array.md" >}})|Medium||||63.3%|
|1716|Calculate Money in Leetcode Bank|[Go]({{< relref "/ChapterFour/1700~1799/1716.Calculate-Money-in-Leetcode-Bank.md" >}})|Easy||||64.3%|
|------------|-------------------------------------------------------|-------| ----------------| ---------------|-------------|-------------|-------------|

2
website/content/ChapterTwo/Sort.md
View File

@ -54,7 +54,7 @@ weight: 14
|1647|Minimum Deletions to Make Character Frequencies Unique|[Go]({{< relref "/ChapterFour/1600~1699/1647.Minimum-Deletions-to-Make-Character-Frequencies-Unique.md" >}})|Medium||||55.6%|
|1648|Sell Diminishing-Valued Colored Balls|[Go]({{< relref "/ChapterFour/1600~1699/1648.Sell-Diminishing-Valued-Colored-Balls.md" >}})|Medium||||30.8%|
|1691|Maximum Height by Stacking Cuboids|[Go]({{< relref "/ChapterFour/1600~1699/1691.Maximum-Height-by-Stacking-Cuboids.md" >}})|Hard||||50.6%|
|1710|Maximum Units on a Truck|[Go]({{< relref "/ChapterFour/1700~1799/1710.Maximum-Units-on-a-Truck.md" >}})|Easy||||69.9%|
|1710|Maximum Units on a Truck|[Go]({{< relref "/ChapterFour/1700~1799/1710.Maximum-Units-on-a-Truck.md" >}})|Easy||||70.0%|
|------------|-------------------------------------------------------|-------| ----------------| ---------------|-------------|-------------|-------------|

2
website/content/ChapterTwo/Stack.md
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@ -27,7 +27,7 @@ weight: 5
|0145|Binary Tree Postorder Traversal|[Go]({{< relref "/ChapterFour/0100~0199/0145.Binary-Tree-Postorder-Traversal.md" >}})|Easy| O(n)| O(1)||58.6%|
|0150|Evaluate Reverse Polish Notation|[Go]({{< relref "/ChapterFour/0100~0199/0150.Evaluate-Reverse-Polish-Notation.md" >}})|Medium| O(n)| O(1)||38.6%|
|0155|Min Stack|[Go]({{< relref "/ChapterFour/0100~0199/0155.Min-Stack.md" >}})|Easy| O(n)| O(n)||47.1%|
|0173|Binary Search Tree Iterator|[Go]({{< relref "/ChapterFour/0100~0199/0173.Binary-Search-Tree-Iterator.md" >}})|Medium| O(n)| O(1)||61.1%|
|0173|Binary Search Tree Iterator|[Go]({{< relref "/ChapterFour/0100~0199/0173.Binary-Search-Tree-Iterator.md" >}})|Medium| O(n)| O(1)||61.2%|
|0224|Basic Calculator|[Go]({{< relref "/ChapterFour/0200~0299/0224.Basic-Calculator.md" >}})|Hard| O(n)| O(n)||38.4%|
|0225|Implement Stack using Queues|[Go]({{< relref "/ChapterFour/0200~0299/0225.Implement-Stack-using-Queues.md" >}})|Easy| O(n)| O(n)||48.3%|
|0227|Basic Calculator II|[Go]({{< relref "/ChapterFour/0200~0299/0227.Basic-Calculator-II.md" >}})|Medium||||39.0%|

6
website/content/ChapterTwo/Tree.md
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@ -13,7 +13,7 @@ weight: 6
|0095|Unique Binary Search Trees II|[Go]({{< relref "/ChapterFour/0001~0099/0095.Unique-Binary-Search-Trees-II.md" >}})|Medium||||43.5%|
|0096|Unique Binary Search Trees|[Go]({{< relref "/ChapterFour/0001~0099/0096.Unique-Binary-Search-Trees.md" >}})|Medium| O(n^2)| O(n)||54.9%|
|0098|Validate Binary Search Tree|[Go]({{< relref "/ChapterFour/0001~0099/0098.Validate-Binary-Search-Tree.md" >}})|Medium| O(n)| O(1)||29.1%|
|0099|Recover Binary Search Tree|[Go]({{< relref "/ChapterFour/0001~0099/0099.Recover-Binary-Search-Tree.md" >}})|Hard| O(n)| O(1)||43.1%|
|0099|Recover Binary Search Tree|[Go]({{< relref "/ChapterFour/0001~0099/0099.Recover-Binary-Search-Tree.md" >}})|Medium| O(n)| O(1)||43.1%|
|0100|Same Tree|[Go]({{< relref "/ChapterFour/0100~0199/0100.Same-Tree.md" >}})|Easy| O(n)| O(1)||54.4%|
|0101|Symmetric Tree|[Go]({{< relref "/ChapterFour/0100~0199/0101.Symmetric-Tree.md" >}})|Easy| O(n)| O(1)||48.8%|
|0102|Binary Tree Level Order Traversal|[Go]({{< relref "/ChapterFour/0100~0199/0102.Binary-Tree-Level-Order-Traversal.md" >}})|Medium| O(n)| O(1)||57.6%|
@ -32,7 +32,7 @@ weight: 6
|0129|Sum Root to Leaf Numbers|[Go]({{< relref "/ChapterFour/0100~0199/0129.Sum-Root-to-Leaf-Numbers.md" >}})|Medium| O(n)| O(1)||51.7%|
|0144|Binary Tree Preorder Traversal|[Go]({{< relref "/ChapterFour/0100~0199/0144.Binary-Tree-Preorder-Traversal.md" >}})|Easy| O(n)| O(1)||58.2%|
|0145|Binary Tree Postorder Traversal|[Go]({{< relref "/ChapterFour/0100~0199/0145.Binary-Tree-Postorder-Traversal.md" >}})|Easy| O(n)| O(1)||58.6%|
|0173|Binary Search Tree Iterator|[Go]({{< relref "/ChapterFour/0100~0199/0173.Binary-Search-Tree-Iterator.md" >}})|Medium| O(n)| O(1)||61.1%|
|0173|Binary Search Tree Iterator|[Go]({{< relref "/ChapterFour/0100~0199/0173.Binary-Search-Tree-Iterator.md" >}})|Medium| O(n)| O(1)||61.2%|
|0199|Binary Tree Right Side View|[Go]({{< relref "/ChapterFour/0100~0199/0199.Binary-Tree-Right-Side-View.md" >}})|Medium| O(n)| O(1)||56.8%|
|0222|Count Complete Tree Nodes|[Go]({{< relref "/ChapterFour/0200~0299/0222.Count-Complete-Tree-Nodes.md" >}})|Medium| O(n)| O(1)||50.2%|
|0226|Invert Binary Tree|[Go]({{< relref "/ChapterFour/0200~0299/0226.Invert-Binary-Tree.md" >}})|Easy| O(n)| O(1)||67.7%|
@ -67,7 +67,7 @@ weight: 6
|0938|Range Sum of BST|[Go]({{< relref "/ChapterFour/0900~0999/0938.Range-Sum-of-BST.md" >}})|Easy||||83.4%|
|0968|Binary Tree Cameras|[Go]({{< relref "/ChapterFour/0900~0999/0968.Binary-Tree-Cameras.md" >}})|Hard||||40.5%|
|0971|Flip Binary Tree To Match Preorder Traversal|[Go]({{< relref "/ChapterFour/0900~0999/0971.Flip-Binary-Tree-To-Match-Preorder-Traversal.md" >}})|Medium||||50.0%|
|0979|Distribute Coins in Binary Tree|[Go]({{< relref "/ChapterFour/0900~0999/0979.Distribute-Coins-in-Binary-Tree.md" >}})|Medium||||70.1%|
|0979|Distribute Coins in Binary Tree|[Go]({{< relref "/ChapterFour/0900~0999/0979.Distribute-Coins-in-Binary-Tree.md" >}})|Medium||||70.0%|
|0987|Vertical Order Traversal of a Binary Tree|[Go]({{< relref "/ChapterFour/0900~0999/0987.Vertical-Order-Traversal-of-a-Binary-Tree.md" >}})|Hard||||39.2%|
|0993|Cousins in Binary Tree|[Go]({{< relref "/ChapterFour/0900~0999/0993.Cousins-in-Binary-Tree.md" >}})|Easy| O(n)| O(1)||52.3%|
|1026|Maximum Difference Between Node and Ancestor|[Go]({{< relref "/ChapterFour/1000~1099/1026.Maximum-Difference-Between-Node-and-Ancestor.md" >}})|Medium||||70.0%|