using System;
public class Program
{
public static void Main()
int totalOdds = 0;
int totalEvens = 0;
for(int i = 1; i < 176; i++)
if(i % 2 == 0)
totalEvens+=i;
if(i % 2 != 0)
totalOdds+=i;
}
Console.WriteLine(Math.Abs(totalEvens - totalOdds));