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题目链接: https://leetcode.com/problems/reverse-string/

GitHub答案链接: https://github.com/turingplanet/leetcode-answers

class Solution {
    public void reverseString(char[] s) {
        int l = 0, r = s.length - 1;
        
        while (l < r) {
            char tmp = s[l];
            s[l] = s[r];
            s[r] = tmp;
            
            l++;
            r--;
        }
    }
}