View Code of Problem 80

#include <stdio.h> 
int main() 
{
    int n, s = 0,M = 3,i; 
    while(scanf("%d", &n)!=EOF)
	{
		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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