Merge pull request #311 from liumingzhuo/master

添加0151.翻转字符串和剑指Offer58-II.左旋转字符串Go版本
This commit is contained in:
Carl Sun
2021-06-02 20:43:16 +08:00
committed by GitHub
2 changed files with 79 additions and 5 deletions

View File

@ -318,9 +318,61 @@ class Solution {
Python
Go
```go
import (
"fmt"
)
func reverseWords(s string) string {
//1.使用双指针删除冗余的空格
slowIndex, fastIndex := 0, 0
b := []byte(s)
//删除头部冗余空格
for len(b) > 0 && fastIndex < len(b) && b[fastIndex] == ' ' {
fastIndex++
}
//删除单词间冗余空格
for ; fastIndex < len(b); fastIndex++ {
if fastIndex-1 > 0 && b[fastIndex-1] == b[fastIndex] && b[fastIndex] == ' ' {
continue
}
b[slowIndex] = b[fastIndex]
slowIndex++
}
//删除尾部冗余空格
if slowIndex-1 > 0 && b[slowIndex-1] == ' ' {
b = b[:slowIndex-1]
} else {
b = b[:slowIndex]
}
//2.反转整个字符串
reverse(&b, 0, len(b)-1)
//3.反转单个单词 i单词开始位置j单词结束位置
i := 0
for i < len(b) {
j := i
for ; j < len(b) && b[j] != ' '; j++ {
}
reverse(&b, i, j-1)
i = j
i++
}
return string(b)
}
func reverse(b *[]byte, left, right int) {
for left < right {
(*b)[left], (*b)[right] = (*b)[right], (*b)[left]
left++
right--
}
}
```

View File

@ -23,7 +23,7 @@ https://leetcode-cn.com/problems/zuo-xuan-zhuan-zi-fu-chuan-lcof/
示例 2
输入: s = "lrloseumgh", k = 6
输出: "umghlrlose"
 
限制:
1 <= k < s.length <= 10000
@ -119,9 +119,31 @@ class Solution {
```
Python
Go
```go
func reverseLeftWords(s string, n int) string {
b := []byte(s)
// 1. 反转前n个字符
// 2. 反转第n到end字符
// 3. 反转整个字符
reverse(b, 0, n-1)
reverse(b, n, len(b)-1)
reverse(b, 0, len(b)-1)
return string(b)
}
// 切片是引用传递
func reverse(b []byte, left, right int){
for left < right{
b[left], b[right] = b[right],b[left]
left++
right--
}
}
```