Cod sursa(job #574339)

Utilizator andreea29Iorga Andreea andreea29 Data 7 aprilie 2011 08:46:38
Problema Factorial Scor 35
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.34 kb
Raporteaza aceasta sursa 
#include<fstream>
using namespace std;
int main()
{unsigned long long n, p, c, u, d;
ifstream f("fact.in");
ofstream h("fact.out");
f>>p;
if (p==0)
	n=1;
else
{c=1;
u=5;
while (c<p)
{u=u+5;
d=u;
do
{d=d/5;
c=c+1;}
while (d%5==0);}
n=u;
}
if (c>p)
	h<<"-1"<<endl;
else
h<<n<<endl;

f.close();
h.close();
return 0;
}