文章作者:Tyan
博客:noahsnail.com | CSDN | 简书
1. Description

2. Solution
class Solution {
public:
string reverseString(string s) {
int i = 0;
int j = s.length() - 1;
while(i < j) {
swap(s[i++], s[j--]);
}
return s;
}
private:
void swap(char& a, char& b) {
char temp = a;
a = b;
b = temp;
}
};
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