View Code of Problem 30

#include <stdio.h>
#include <string.h>
#include <math.h>
#define N 100
int qh(int n)
{
	if(n==1)
		return 1;
	else
		return	n+qh(n-1);
}
int main()
{
	int n;
	while(scanf("%d",&n)!=EOF)
		printf("%d\n",qh(n));
}