#include<bits/stdc++.h>
using namespace std;
int main(){
    int n;
    cin >> n;
    if (n < 256) {
        n += 256;
    }
    n = (n << 16) >> 16;
    n *= n;
    n = (n << 8) >> 16;
    cout << n << endl;
    return 0;
}