#include <iostream>
#include <cstring>
using namespace std;

int main()
{
    setlocale(LC_ALL, "ru");

    const int MAX = 80;
    char str[MAX];
    int len = 0;

    cout << "\n Введите строку: ";

    cin >> str;
    len = strlen(str);

    for ( int i = 0; i < len / 2; i++ )
    {
        char temp = str[i];
        str[i] = ( len - i - 1);
        str[len - i - 1] = temp;
    }

    cout << str;

    return 0;
}