View Code of Problem 80

#include<stdio.h>
int main()
{
	int n;
	int a[100];
	scanf("%d\n",&n);
	while(n!=NULL)
	{
		int sum=0;
		for(int i=2;i<=n;i++)
		{
			sum=(sum+3)%i;
		}
		printf("%d\n",sum+1);
		scanf("%d",&n);
	}
	return 0;
}