Cod sursa(job #267955)
| Utilizator |  Manea Constantin venom4u31 |
Data | 28 februarie 2009 15:55:08 |
|---|---|---|---|
| Problema | Factorial | Scor | 100 |
| Compilator | cpp | Status | done |
| Runda | Arhiva de probleme | Marime | 0.29 kb |
#include <fstream.h>
int main ()
{long i,s,j,p;
ifstream f("fact.in");
ofstream g("fact.out");
f>>p;
if (p==0) g<<1;
else if (p<5) g<<5*p;
else for (i=p*4;i<=p*5;i=i+5)
{s=0;
for (j=5;j<=i;j=j*5)
s=s+i/j;
if(s>p) {g<<-1; break;}
else if (s==p) {g<<i/5*5; break;}
}
return 0;
}