import java.util.ArrayList; import java.util.List; /** * Created by Crystal on 6/29/2015. */ public class Program { public static void main(String[] args) { // Project Euler #6: Find the difference between the sum of the squares of the first one hundred natural numbers and the square of the sum // Starting value, set x to 100 long start = System.nanoTime(); int x = 100; int sumOfSquares = (x * (x + 1) * (2 * x + 1)) / 6; int sum = 0; for (int i = 1; i <= x; i++)sum += i; long stop = System.nanoTime(); System.out.println(sum*sum - sumOfSquares + " is the solution calculated in a time of " + (stop - start) / 1000000 + "ms"); } }

25164150 is the solution calculated in a time of 0ms.