LeetCode 344: Reverse String

LeetCode String

Write a function that takes a string as input and returns the string reversed. Example: Given s = "hello", return "olleh".

代码

C语言版本：

char* reverseString(char* s) {
    int left = 0;
    int right = strlen(s) - 1;
    
    while (left<right){
        s[left] ^= s[right];
        s[right] ^= s[left];
        s[left] ^= s[right];
        left++;
        right--;
    }
    return s;
}

476 / 476 test cases passed.
Status: Accepted
Runtime: 4 ms
C++版本：

class Solution {
public:
    string reverseString(string s) {
        int l = 0, r = s.size() - 1;
        while (l < r){
            swap(s[l++], s[r--]);
        }
        return s;
    }
};

476 / 476 test cases passed.
Status: Accepted
Runtime: 12 ms