344-Reverse-String.cpp

class Solution {
public:
    string reverseString(string s) {
        int l = s.length();
        
        for(int i = 0; i < l/2; i++){
            char c = s[i];
            
            s[i] = s[l-1-i];
            s[l-1-i] = c;
        }
        
        return s;
    }
};