/*************************************************************************
 *  Compilation:  javac Stopwatch.java
 *
 *
 *************************************************************************/

public class Stopwatch {  
    private long start;

    public Stopwatch() {
        start = System.currentTimeMillis();
    }

    // start the stopwatch
    public double elapsedTime() {
        long current = System.currentTimeMillis();
        return (current - start) / 1000.0;
    }
    
    // test client
    public static void main(String[] args) {
        int N = Integer.parseInt(args[0]);

        Stopwatch timer = new Stopwatch();

        int sum = 0;
        for (int i = 0; i < N; i++)
            sum += i*i*i;
        System.out.println(sum);

        System.out.println("elapsed time = " + timer.elapsedTime());

    }
   
}