AOJ Volume0-0014

http://judge.u-aizu.ac.jp/onlinejudge/description.jsp?id=0014&lang=jp

#include <iostream>
using namespace std;

int main (int argc, const char * argv[])
{
    int read = 0;
    
    while (cin >> read) {
        
        int num = read;
        long long int sum = 0;
        
        for (int i = 1;(i * num) <= (600 - read) ; i++) {
            sum += ((i * num) * (i * num) * read);
        }
        cout << sum << "\n";
    }
    
    return 0;
}