保龄

//P1307
#include <iostream>
using namespace std;

long long number_reverse(long long n){
    long long ans=0,t;
    while(n%10==0){
        n /= 10;
    }
    while(t){
        t = n % 10;
        n /= 10;
        ans += t;
        ans *= 10;
    }
    ans /= 100;
    return ans;
}

int main(){
    int n;
    cin >> n;
    cout << number_reverse(n);
    return 0;
}