刷题11：HJ11 字符串反转

#include <iostream>
using namespace std;

int main()
{
    
    
    string num;
    cin >> num;
    for (int i = num.length()-1; i >=0; i--)
    {
    
    
        cout << num[i];
    }
    cout << endl;

    return 0;
}