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#include <iostream>
#include <fstream>
using namespace std;
ifstream fin ("fact.in");
ofstream fout ("fact.out");
unsigned long long a[14],b[14],c[14],i,x,suma;
int main()
{
a[1]=1;
b[1]=1;
for(i=2;i<=12;i++)
{
a[i]=a[i-1]*5;
b[i]=b[i-1]*5+1;
}
fin>>x;
for(i=1;b[i]<=x;i++);
i--;
while(x!=0)
{
if(b[i]>x)
i--;
if(b[i]<=x)
{
suma += a[i]*5;
x -= b[i];
c[i]++;
if(c[i]==5)
{
fout<<-1;
return 0;
}
}
}
fout<<suma;
}