View Code of Problem 80

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

		printf("%d\n",s+1);
	}
    return 0;
}

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