View Code of Problem 80

#include<stdio.h>
int main()
{
	int n;
	while( scanf("%d",&n) != EOF )
	{
		int s=0,m=3;
		if (n==0)
		   break;
		else if(n==1)
		  printf("%d\n",n);
		else if(n==2)
		  printf("%d\n",n);	
		else{
		
		for(int i=2;i<=n;++i)
		{
			s = (s+m)%i;
		}
		printf("%d\n",s+1);
		}
	}
	return 0;
}