leetcode344-反转字符串
作者:互联网
反转字符串
力扣链接
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 s 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。
示例 1:
输入:s = ["h","e","l","l","o"]
输出:["o","l","l","e","h"]
示例 2:
输入:s = ["H","a","n","n","a","h"]
输出:["h","a","n","n","a","H"]
提示:
- 1 <= s.length <= 105
- s[i] 都是 ASCII 码表中的可打印字符
我的解题思路
使用双指针low和high,low指0索引,high指数组.length - 1索引,然后循环low < high时,交换两个位置的字符,然后low++,high–;
代码
class Solution {
public void reverseString(char[] s) {
int low = 0;
int high = s.length - 1;
while (low < high) {
char temp = s[low];
s[low] = s[high];
s[high] = temp;
low++;
high--;
}
}
}
时间复杂度
O(N)
标签:字符,反转,leetcode344,high,low,数组,字符串,输入 来源: https://blog.csdn.net/qq_43478625/article/details/120844300