ProjectEuler1.java

/**
 *
 * @author i88.ca
 */
public class ProjectEuler1 {

    public static void main(String[] args) {
        int s = sumDivisibleBy(3) + sumDivisibleBy(5) - sumDivisibleBy(15);

        System.out.println(s);
    }

    public static int sumDivisibleBy(int n) {
        int p = 999 / n;
        return n * (p * (p + 1)) / 2;
    }


}