规范格式

leetcode/0942.DI-String-Match/942. DI String Match.go

@@ -0,0 +1,17 @@
+package leetcode
+
+func diStringMatch(S string) []int {
+	result, maxNum, minNum, index := make([]int, len(S)+1), len(S), 0, 0
+	for _, ch := range S {
+		if ch == 'I' {
+			result[index] = minNum
+			minNum++
+		} else {
+			result[index] = maxNum
+			maxNum--
+		}
+		index++
+	}
+	result[index] = minNum
+	return result
+}

leetcode/0942.DI-String-Match/942. DI String Match_test.go

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+package leetcode
+
+import (
+	"fmt"
+	"testing"
+)
+
+type question942 struct {
+	para942
+	ans942
+}
+
+// para 是参数
+// one 代表第一个参数
+type para942 struct {
+	S string
+}
+
+// ans 是答案
+// one 代表第一个答案
+type ans942 struct {
+	one []int
+}
+
+func Test_Problem942(t *testing.T) {
+
+	qs := []question942{
+
+		question942{
+			para942{"IDID"},
+			ans942{[]int{0, 4, 1, 3, 2}},
+		},
+
+		question942{
+			para942{"III"},
+			ans942{[]int{0, 1, 2, 3}},
+		},
+
+		question942{
+			para942{"DDI"},
+			ans942{[]int{3, 2, 0, 1}},
+		},
+	}
+
+	fmt.Printf("------------------------Leetcode Problem 942------------------------\n")
+
+	for _, q := range qs {
+		_, p := q.ans942, q.para942
+		fmt.Printf("【input】:%v       【output】:%v\n", p, diStringMatch(p.S))
+	}
+	fmt.Printf("\n\n\n")
+}

leetcode/0942.DI-String-Match/README.md

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+# [942. DI String Match](https://leetcode.com/problems/di-string-match/)
+
+
+## 题目
+
+Given a string `S` that **only** contains "I" (increase) or "D" (decrease), let `N = S.length`.
+
+Return **any** permutation `A` of `[0, 1, ..., N]` such that for all `i = 0, ..., N-1`:
+
+- If `S[i] == "I"`, then `A[i] < A[i+1]`
+- If `S[i] == "D"`, then `A[i] > A[i+1]`
+
+**Example 1:**
+
+    Input: "IDID"
+    Output: [0,4,1,3,2]
+
+**Example 2:**
+
+    Input: "III"
+    Output: [0,1,2,3]
+
+**Example 3:**
+
+    Input: "DDI"
+    Output: [3,2,0,1]
+
+**Note:**
+
+1. `1 <= S.length <= 10000`
+2. `S` only contains characters `"I"` or `"D"`.
+
+
+## 题目大意
+
+给定只含 "I"（增大）或 "D"（减小）的字符串 S ，令 N = S.length。返回 [0, 1, ..., N] 的任意排列 A 使得对于所有 i = 0, ..., N-1，都有：
+
+- 如果 S[i] == "I"，那么 A[i] < A[i+1]
+- 如果 S[i] == "D"，那么 A[i] > A[i+1]
+
+
+
+## 解题思路
+
+
+- 给出一个字符串，字符串中只有字符 `"I"` 和字符 `"D"`。字符 `"I"` 代表 `A[i] < A[i+1]`，字符 `"D"` 代表 `A[i] > A[i+1]` ，要求找到满足条件的任意组合。
+- 这一题也是水题，取出字符串长度即是最大数的数值，然后按照题意一次排出最终数组即可。
+