规范格式

leetcode/0385.Mini-Parser/385. Mini Parser.go

@@ -0,0 +1,124 @@
+package leetcode
+
+import (
+	"fmt"
+	"strconv"
+)
+
+/**
+ * // This is the interface that allows for creating nested lists.
+ * // You should not implement it, or speculate about its implementation
+ * type NestedInteger struct {
+ * }
+ *
+ * // Return true if this NestedInteger holds a single integer, rather than a nested list.
+ * func (n NestedInteger) IsInteger() bool {}
+ *
+ * // Return the single integer that this NestedInteger holds, if it holds a single integer
+ * // The result is undefined if this NestedInteger holds a nested list
+ * // So before calling this method, you should have a check
+ * func (n NestedInteger) GetInteger() int {}
+ *
+ * // Set this NestedInteger to hold a single integer.
+ * func (n *NestedInteger) SetInteger(value int) {}
+ *
+ * // Set this NestedInteger to hold a nested list and adds a nested integer to it.
+ * func (n *NestedInteger) Add(elem NestedInteger) {}
+ *
+ * // Return the nested list that this NestedInteger holds, if it holds a nested list
+ * // The list length is zero if this NestedInteger holds a single integer
+ * // You can access NestedInteger's List element directly if you want to modify it
+ * func (n NestedInteger) GetList() []*NestedInteger {}
+ */
+
+// NestedInteger define
+type NestedInteger struct {
+	Num  int
+	List []*NestedInteger
+}
+
+// IsInteger define
+func (n NestedInteger) IsInteger() bool {
+	if n.List == nil {
+		return true
+	}
+	return false
+}
+
+// GetInteger define
+func (n NestedInteger) GetInteger() int {
+	return n.Num
+}
+
+// SetInteger define
+func (n *NestedInteger) SetInteger(value int) {
+	n.Num = value
+}
+
+// Add define
+func (n *NestedInteger) Add(elem NestedInteger) {
+	n.List = append(n.List, &elem)
+}
+
+// GetList define
+func (n NestedInteger) GetList() []*NestedInteger {
+	return n.List
+}
+
+// Print define
+func (n NestedInteger) Print() {
+	if len(n.List) != 0 {
+		for _, v := range n.List {
+			if len(v.List) != 0 {
+				v.Print()
+				return
+			}
+			fmt.Printf("%v ", v.Num)
+		}
+	} else {
+		fmt.Printf("%v ", n.Num)
+	}
+	fmt.Printf("\n")
+}
+
+func deserialize(s string) *NestedInteger {
+	stack, cur := []*NestedInteger{}, &NestedInteger{}
+	for i := 0; i < len(s); {
+		switch {
+		case isDigital(s[i]) || s[i] == '-':
+			j := 0
+			for j = i + 1; j < len(s) && isDigital(s[j]); j++ {
+			}
+			num, _ := strconv.Atoi(s[i:j])
+			next := &NestedInteger{}
+			next.SetInteger(num)
+			if len(stack) > 0 {
+				stack[len(stack)-1].List = append(stack[len(stack)-1].GetList(), next)
+			} else {
+				cur = next
+			}
+			i = j
+		case s[i] == '[':
+			next := &NestedInteger{}
+			if len(stack) > 0 {
+				stack[len(stack)-1].List = append(stack[len(stack)-1].GetList(), next)
+			}
+			stack = append(stack, next)
+			i++
+		case s[i] == ']':
+			cur = stack[len(stack)-1]
+			stack = stack[:len(stack)-1]
+			i++
+		case s[i] == ',':
+			i++
+		}
+	}
+	return cur
+}
+
+func isDigital(v byte) bool {
+	if v >= '0' && v <= '9' {
+		return true
+	}
+	return false
+}

leetcode/0385.Mini-Parser/385. Mini Parser_test.go

@@ -0,0 +1,64 @@
+package leetcode
+
+import (
+	"fmt"
+	"testing"
+)
+
+type question385 struct {
+	para385
+	ans385
+}
+
+// para 是参数
+// one 代表第一个参数
+type para385 struct {
+	n string
+}
+
+// ans 是答案
+// one 代表第一个答案
+type ans385 struct {
+	one []int
+}
+
+func Test_Problem385(t *testing.T) {
+
+	qs := []question385{
+
+		question385{
+			para385{"[[]]"},
+			ans385{[]int{}},
+		},
+
+		question385{
+			para385{"[]"},
+			ans385{[]int{}},
+		},
+
+		question385{
+			para385{"[-1]"},
+			ans385{[]int{-1}},
+		},
+
+		question385{
+			para385{"[123,[456,[789]]]"},
+			ans385{[]int{123, 456, 789}},
+		},
+
+		question385{
+			para385{"324"},
+			ans385{[]int{324}},
+		},
+	}
+
+	fmt.Printf("------------------------Leetcode Problem 385------------------------\n")
+
+	for _, q := range qs {
+		_, p := q.ans385, q.para385
+		fmt.Printf("【input】:%v       【output】: \n", p)
+		fmt.Printf("NestedInteger = ")
+		deserialize(p.n).Print()
+	}
+	fmt.Printf("\n\n\n")
+}

leetcode/0385.Mini-Parser/README.md

@@ -0,0 +1,50 @@
+# [385. Mini Parser](https://leetcode.com/problems/mini-parser/)
+
+
+## 题目:
+
+Given a nested list of integers represented as a string, implement a parser to deserialize it.
+
+Each element is either an integer, or a list -- whose elements may also be integers or other lists.
+
+**Note:** You may assume that the string is well-formed:
+
+- String is non-empty.
+- String does not contain white spaces.
+- String contains only digits `0-9`, `[`, `-` `,`, `]`.
+
+**Example 1:**
+
+    Given s = "324",
+    
+    You should return a NestedInteger object which contains a single integer 324.
+
+**Example 2:**
+
+    Given s = "[123,[456,[789]]]",
+    
+    Return a NestedInteger object containing a nested list with 2 elements:
+    
+    1. An integer containing value 123.
+    2. A nested list containing two elements:
+        i.  An integer containing value 456.
+        ii. A nested list with one element:
+             a. An integer containing value 789.
+
+
+## 题目大意
+
+给定一个用字符串表示的整数的嵌套列表，实现一个解析它的语法分析器。列表中的每个元素只可能是整数或整数嵌套列表
+
+提示：你可以假定这些字符串都是格式良好的：
+
+- 字符串非空
+- 字符串不包含空格
+- 字符串只包含数字0-9, [, - ,, ]
+
+
+
+## 解题思路
+
+- 将一个嵌套的数据结构中的数字转换成 NestedInteger 数据结构。
+- 这一题用栈一层一层的处理就行。有一些比较坑的特殊的边界数据见测试文件。这一题正确率比很多 Hard 题还要低的原因应该是没有理解好题目和边界测试数据没有考虑到。NestedInteger 这个数据结构笔者实现了一遍，见代码。