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#include <fstream>
#include <iostream>
using namespace std;
int main()
{
int p,k,y,x,n,i,r;
ifstream f("fact.in");
ofstream g("fact.out");
f>>p;
n=1;
y=n;
for (i=1;i<=100000000;i++)
{
k=0;
x=y;
while (x)
{
r=x%10;
if (r==0)
{
k++;
}
x=x/10;
if (x%10!=0)
{
break;
}
}
if (k==p)
{
g<<n;
break;
}
y=n*(n+1);
n+=1;
}
if (k!=p)
{
g<<"-1";
}
f.close();
g.close();
return 0;
}