문제
풀이
#include <iostream>
using namespace std;
bool solve(void) {
int n; cin >> n;
if (n == 0) return false;
cout << n * n * (n+1) * (n+1) / 4 << "\n";
return true;
}
int main(void) {
ios::sync_with_stdio(false);
cin.tie(nullptr);
while (solve());
return 0;
}