Cod sursa(job #1364431)

Utilizator adi_barbulescu99Barbulescu adi_barbulescu99 Data 27 februarie 2015 17:43:38
Problema Factorial Scor 20
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.31 kb
Raporteaza aceasta sursa 
#include <fstream>

using namespace std;

int main()
{int p,n,x,f;
ifstream b("fact.in");
ofstream g("fact.out");
b>>p;
n=0;
do
{
    n=n+5;
    x=0;
    f=5;
    while(f<=n)
    {
        x=x+n/f;
        f=f*5;
    }
    }while(x<p);
      if(x==p)   g<<n;
    else g<<-1;


    return 0;
}