Cod sursa(job #538793)

Utilizator swxxIoo Andrei Rares swxx Data 21 februarie 2011 21:59:34
Problema Factorial Scor 15
Compilator cpp Status done
Runda contest- Marime 0.3 kb
Raporteaza aceasta sursa 
#include<fstream>
using namespace std;
ifstream f("fact.in");
ofstream g("fact.out");
unsigned long o;
int main()
{

f>>o;

unsigned long s=0,q=0,i;
if(o!=0)
{
for( i=5;s<=o;i=i+5)
{
q=i;
while(q%5==0)
{
s=s+1;
q=q/5;
}
}
if(s!=o)g<<-1;
else g<<i;
}
else g<<1;

return 0;
}