#include <bits/stdc++.h>
using namespace std;
int ReverseNumber(int n){
int reverse_Num = 0;
while(n > 0) {
int digit = n%10;
reverse_Num = reverse_Num*10 + digit;
n /= 10;
}
return reverse_Num;
}
int main() {
int n;
cin >> n;
cout << ReverseNumber(n);
return 0;
}