Cod sursa(job #361377)
| Utilizator |  Cristi Cristi09 |
Data | 4 noiembrie 2009 20:59:46 |
|---|---|---|---|
| Problema | Factorial | Scor | 15 |
| Compilator | cpp | Status | done |
| Runda | Arhiva de probleme | Marime | 0.27 kb |
#include<fstream.h>
int main()
{
long p,n,ok=0;
ifstream f("fact.in");
f>>p;
f.close();
if(p%5==0&&p%10!=0)n=-1;
else
{ if(p)
{
ok=p/5;
if(ok%2==0&&ok)ok--;
n=p*5-ok*5;
}
else n=1;
}
ofstream g("fact.out");
g<<n;
g.close();
}