View Code of Problem 80

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