HDOJ-1001 Sum Problem

http://acm.hdu.edu.cn/showproblem.php?pid=1001

# include <stdio.h>

int main ()
{
	int n;
	while(scanf("%d",&n) != EOF)
	{
		int Sum = 0;
		for(int i = 1; i <= n; i++)
			Sum += i;
		printf("%d\n\n",Sum);
	}

	return 0;
}