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

int main()
{
    string s;
    cin >> s;
    int number = 0;
    for(int i = 0; i < s.size(); i++) {
        number = (number * 10) + (s[i] - '0');
    }
    cout << number << endl;
    return 0;
}