题解 | #数字颠倒#

翻转字符串

#include<iostream>
#include<string>

using namespace std;

int main() {
    string str;
    cin >> str;
    for (int i = 0, j = str.size() - 1; i < str.size()/2; i++, j--) {
        swap(str[i], str[j]);
    }
    cout << str;
}