Cod sursa(job #300065)

Utilizator APMeMangra Alex APMe Data 7 aprilie 2009 11:04:57
Problema Factorial Scor 10
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.33 kb
Raporteaza aceasta sursa 
#include<fstream.h>
main()
{long p,n=0,cont=1,c;
 ifstream i("fact.in");
 ofstream o("fact.out");
 i>>p;
 while(p--)
  {n=n+5;
   c=cont;
   while(cont%5==0)
    {p--;cont/=5;}
   cont=c;
   cont++;
   if(p<0)
    break;
  }
 if(p<0)
   o<<"-1"<<'\n';
  else
   o<<n<<'\n';
 i.close();
 o.close();
 return 0;
}