#include<stdio.h>
int divided(int n, int m) //注意該遞歸函數(shù)的定義
{
   if(n/5==0 || n%5!=1)return 0;
   if(m==1) return 1;
   return divided(n-n/5-1, m-1);
}
int main(int argc, char *argv[])
{
   int n;
   int m = 5;
   for(n = 1; ; n++)
   if(divided(n,m))
   {printf("%d\n", n);
   break;
   }
}