Cod sursa(job #36944)

Utilizator c_iulyanCretu Iulian c_iulyan Data 24 martie 2007 12:38:38
Problema Factorial Scor 40
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.3 kb
Raporteaza aceasta sursa 
#include<fstream.h>
ifstream f("fact.in");
ofstream g("fact.out");
long kk(long x)
{long hh=0;
while(x%5==0)
{hh++; x=x/5;}
return hh;
}

int main()
{long n;
f>>n;
if(n==0) g<<1;
else if(n%10==5) g<<"-1";
else
{long k=0,i=5;
while(k<n)
{k=k+kk(i);
i=i+5;
}
g<<i-5;
}
return 0;
}