Cod sursa(job #487710)
Utilizator | Vlad Victor Paladinqaz | Data | 26 septembrie 2010 11:30:52 |
---|---|---|---|
Problema | Factorial | Scor | 35 |
Compilator | cpp | Status | done |
Runda | Arhiva de probleme | Marime | 0.46 kb |
#include <fstream.h>
int main()
{
int nr,i, vf5, aux;
ifstream fin ("fact.in");
ofstream fout ("fact.out");
fin >> nr;
if ( nr == 0 )
{
fout << 1;
return 0;
}
i=1;
vf5 = 0;
while (vf5 < nr)
{
if (i % 5 == 0)
{
aux=i;
while (aux % 5==0)
{
aux=aux/5;
vf5++;
}
}
i++;
}
if (vf5==nr)
{
fout << i - 1;
}
else fout << -1;
fin.close();
fout.close();
return 0;
}