mirror of
https://gitee.com/TheAlgorithms/LeetCodeAnimation.git
synced 2024-12-06 15:19:44 +08:00
62 lines
1.6 KiB
Java
62 lines
1.6 KiB
Java
# LeetCode 第 344 号问题:反转字符串
|
||
|
||
> 本文首发于公众号「五分钟学算法」,是[图解 LeetCode ](<https://github.com/MisterBooo/LeetCodeAnimation>)系列文章之一。
|
||
>
|
||
> 个人网站:[https://www.cxyxiaowu.com](https://www.cxyxiaowu.com)
|
||
|
||
题目来源于 LeetCode 第 344 号问题:反转字符串。面试官最喜欢让你手写的一道算法题!
|
||
|
||
### 题目描述
|
||
|
||
编写一个函数,其作用是将输入的字符串反转过来。输入字符串以字符数组 `char[]` 的形式给出。
|
||
|
||
不要给另外的数组分配额外的空间,你必须**原地修改输入数组**、使用 O(1) 的额外空间解决这一问题。
|
||
|
||
你可以假设数组中的所有字符都是 [ASCII](https://baike.baidu.com/item/ASCII) 码表中的可打印字符。
|
||
|
||
**示例 1:**
|
||
|
||
```
|
||
输入:["h","e","l","l","o"]
|
||
输出:["o","l","l","e","h"]
|
||
```
|
||
|
||
**示例 2:**
|
||
|
||
```
|
||
输入:["H","a","n","n","a","h"]
|
||
输出:["h","a","n","n","a","H"]
|
||
```
|
||
|
||
###
|
||
|
||
### 题目解析
|
||
|
||
这道题没什么难度,直接从两头往中间走,同时交换两边的字符。注意需要白板编程写出来即可,也注意千万别回答一句使用 reverse() 这种高级函数来解决。。。
|
||
|
||
### 动画描述
|
||
|
||
![](<https://bucket-1257126549.cos.ap-guangzhou.myqcloud.com/blog/ariy2.gif>)
|
||
|
||
### 代码实现
|
||
|
||
```
|
||
class Solution {
|
||
public:
|
||
string reverseString(string s) {
|
||
int i = 0, j = s.size() - 1;
|
||
while (i < j){
|
||
swap(s[i],s[j]);
|
||
i++;
|
||
j--;
|
||
}
|
||
return s;
|
||
}
|
||
};
|
||
```
|
||
|
||
|
||
|
||
|
||
|
||
![](https://blog-1257126549.cos.ap-guangzhou.myqcloud.com/blog/bksj7.png) |