添加 problem 557

Algorithms/0557. Reverse Words in a String III/557. Reverse Words in a String III.go

@@ -0,0 +1,24 @@
+package leetcode
+
+import (
+	"strings"
+)
+
+func reverseWords(s string) string {
+	ss := strings.Split(s, " ")
+	for i, s := range ss {
+		ss[i] = revers(s)
+	}
+	return strings.Join(ss, " ")
+}
+
+func revers(s string) string {
+	bytes := []byte(s)
+	i, j := 0, len(bytes)-1
+	for i < j {
+		bytes[i], bytes[j] = bytes[j], bytes[i]
+		i++
+		j--
+	}
+	return string(bytes)
+}

Algorithms/0557. Reverse Words in a String III/557. Reverse Words in a String III_test.go

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+package leetcode
+
+import (
+	"fmt"
+	"testing"
+)
+
+type question557 struct {
+	para557
+	ans557
+}
+
+// para 是参数
+// one 代表第一个参数
+type para557 struct {
+	s string
+}
+
+// ans 是答案
+// one 代表第一个答案
+type ans557 struct {
+	one string
+}
+
+func Test_Problem557(t *testing.T) {
+
+	qs := []question557{
+
+		question557{
+			para557{"Let's take LeetCode contest"},
+			ans557{"s'teL ekat edoCteeL tsetnoc"},
+		},
+
+		question557{
+			para557{""},
+			ans557{""},
+		},
+	}
+
+	fmt.Printf("------------------------Leetcode Problem 557------------------------\n")
+
+	for _, q := range qs {
+		_, p := q.ans557, q.para557
+		fmt.Printf("【input】:%v       【output】:%v\n", p, reverseWords(p.s))
+	}
+	fmt.Printf("\n\n\n")
+}

Algorithms/0557. Reverse Words in a String III/README.md

@@ -0,0 +1,25 @@
+# [557. Reverse Words in a String III](https://leetcode.com/problems/reverse-words-in-a-string-iii/)
+
+
+## 题目:
+
+Given a string, you need to reverse the order of characters in each word within a sentence while still preserving whitespace and initial word order.
+
+**Example 1:**
+
+    Input: "Let's take LeetCode contest"
+    Output: "s'teL ekat edoCteeL tsetnoc"
+
+**Note:** In the string, each word is separated by single space and there will not be any extra space in the string.
+
+
+## 题目大意
+
+给定一个字符串，你需要反转字符串中每个单词的字符顺序，同时仍保留空格和单词的初始顺序。注意：在字符串中，每个单词由单个空格分隔，并且字符串中不会有任何额外的空格。
+
+
+## 解题思路
+
+
+- 反转字符串，要求按照空格隔开的小字符串为单位反转。
+- 这是一道简单题。按照题意反转每个空格隔开的单词即可。