Cod sursa(job #1645986)
Utilizator | Data | 10 martie 2016 14:37:29 | |
---|---|---|---|
Problema | Factorial | Scor | 0 |
Compilator | cpp | Status | done |
Runda | Arhiva de probleme | Marime | 0.39 kb |
#include <fstream.h>
ifstream fin("fact.in");
ofstream fout("fact.out");
int main ()
{
long i,s,j,p;
fin>>p;
if (p==0) fout<<1;
else if (p<5) fout<<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) {fin<<-1; break;}
else if (s==p) {fin<<i/5*5; break;}
}
return 0;
}