// problem A
#include <iostream>
using namespace std;
int main() {
int n;
cin >> n;
cout << n * n;
return 0;
}
Ly8gcHJvYmxlbSBBCiNpbmNsdWRlIDxpb3N0cmVhbT4KdXNpbmcgbmFtZXNwYWNlIHN0ZDsKCmludCBtYWluKCkgewoJaW50IG47CiAgICBjaW4gPj4gbjsKICAgIGNvdXQgPDwgbiAqIG47CglyZXR1cm4gMDsKfQ==