//
//	CS212 Review #5
//
//	Author: ???
//	Instructor: John Wang
//
//	Goal: Thie progrsm will compute 1+2+ ... + 100
//

import java.util.Scanner;
class Review_5
{
	public static void main(String[] args)
	{
		Scanner input = new Scanner(System.in);

		int sum = 0;
		for(int count=0; count<=100; count++)
		{
			sum += count;
		}
		System.out.println(sum);

		System.out.println("Done.");
	}
}