#include<iostream.h>
#include<fstream.h>
int p,n,c,k;
int main()
{ifstream f("fact.in");
f>>p;
while(n!=k)
  {n=n*(n-1);
  while(c%k)
    n=n*n+n/k%10;
    if(c)
      k=k/10;}
ofstream g("fact.out");
}