# include <iostream>
# include <fstream>
using namespace std;

int P,N,i,n,S;

int main()
{fstream f("fact.in",ios::in);
f>>P;
S=0;
cin>>n;
max=S;
for(i=1;i<=n;i++)
{S=S*i;
while(max>S)
   while(S!=0)
   c=S&10;
   S=S/10;
   if (c=0) n=n+1;
   if n=P}
   cout S;
   fstream g("fact.out",ios::out);
   g<<i;
   g.close();f.close();
}