mirror of
https://github.com/youngyangyang04/leetcode-master.git
synced 2025-07-07 15:45:40 +08:00
更新 0018.四数之和 排版格式修复
This commit is contained in:
@ -27,9 +27,11 @@
|
||||
[-2, 0, 0, 2]
|
||||
]
|
||||
|
||||
# 思路
|
||||
## 算法公开课
|
||||
|
||||
针对本题,我录制了视频讲解:[难在去重和剪枝!| LeetCode:18. 四数之和](https://www.bilibili.com/video/BV1DS4y147US),结合本题解一起看,事半功倍!
|
||||
**[《代码随想录》算法视频公开课](https://programmercarl.com/other/gongkaike.html):[难在去重和剪枝!| LeetCode:18. 四数之和](https://www.bilibili.com/video/BV1DS4y147US),相信结合视频再看本篇题解,更有助于大家对本题的理解**。
|
||||
|
||||
## 思路
|
||||
|
||||
四数之和,和[15.三数之和](https://programmercarl.com/0015.三数之和.html)是一个思路,都是使用双指针法, 基本解法就是在[15.三数之和](https://programmercarl.com/0015.三数之和.html) 的基础上再套一层for循环。
|
||||
|
||||
@ -147,16 +149,10 @@ if (nums[k] + nums[i] > target && nums[i] >= 0) {
|
||||
|
||||
不过这种剪枝 其实有点 小绕,大家能够理解 文章给的完整代码的剪枝 就够了。
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
## 其他语言版本
|
||||
|
||||
### Java:
|
||||
|
||||
Java:
|
||||
```Java
|
||||
class Solution {
|
||||
public List<List<Integer>> fourSum(int[] nums, int target) {
|
||||
@ -206,8 +202,9 @@ class Solution {
|
||||
}
|
||||
```
|
||||
|
||||
Python:
|
||||
### Python:
|
||||
(版本一) 双指针
|
||||
|
||||
```python
|
||||
class Solution:
|
||||
def fourSum(self, nums: List[int], target: int) -> List[List[int]]:
|
||||
@ -273,7 +270,8 @@ class Solution(object):
|
||||
|
||||
```
|
||||
|
||||
Go:
|
||||
### Go:
|
||||
|
||||
```go
|
||||
func fourSum(nums []int, target int) [][]int {
|
||||
if len(nums) < 4 {
|
||||
@ -323,7 +321,7 @@ func fourSum(nums []int, target int) [][]int {
|
||||
}
|
||||
```
|
||||
|
||||
javaScript:
|
||||
### JavaScript:
|
||||
|
||||
```js
|
||||
/**
|
||||
@ -359,7 +357,7 @@ var fourSum = function(nums, target) {
|
||||
};
|
||||
```
|
||||
|
||||
TypeScript:
|
||||
### TypeScript:
|
||||
|
||||
```typescript
|
||||
function fourSum(nums: number[], target: number): number[][] {
|
||||
@ -400,7 +398,7 @@ function fourSum(nums: number[], target: number): number[][] {
|
||||
};
|
||||
```
|
||||
|
||||
PHP:
|
||||
### PHP:
|
||||
|
||||
```php
|
||||
class Solution {
|
||||
@ -445,7 +443,8 @@ class Solution {
|
||||
}
|
||||
```
|
||||
|
||||
Swift:
|
||||
### Swift:
|
||||
|
||||
```swift
|
||||
func fourSum(_ nums: [Int], _ target: Int) -> [[Int]] {
|
||||
var res = [[Int]]()
|
||||
@ -493,7 +492,8 @@ func fourSum(_ nums: [Int], _ target: Int) -> [[Int]] {
|
||||
}
|
||||
```
|
||||
|
||||
C#:
|
||||
### C#:
|
||||
|
||||
```csharp
|
||||
public class Solution
|
||||
{
|
||||
@ -555,7 +555,8 @@ public class Solution
|
||||
}
|
||||
```
|
||||
|
||||
Rust:
|
||||
### Rust:
|
||||
|
||||
```Rust
|
||||
use std::cmp::Ordering;
|
||||
impl Solution {
|
||||
@ -603,7 +604,8 @@ impl Solution {
|
||||
}
|
||||
```
|
||||
|
||||
Scala:
|
||||
### Scala:
|
||||
|
||||
```scala
|
||||
object Solution {
|
||||
// 导包
|
||||
@ -651,3 +653,4 @@ object Solution {
|
||||
<a href="https://programmercarl.com/other/kstar.html" target="_blank">
|
||||
<img src="../pics/网站星球宣传海报.jpg" width="1000"/>
|
||||
</a>
|
||||
|
||||
|
Reference in New Issue
Block a user