View Code of Problem 80

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