Cod sursa(job #136681)
Utilizator | Anton Flavius Valentin Vv3n0M | Data | 15 februarie 2008 19:33:29 |
---|---|---|---|
Problema | Factorial | Scor | 50 |
Compilator | cpp | Status | done |
Runda | Arhiva de probleme | Marime | 0.47 kb |
#include<iostream.h>
#include<fstream.h>
int main()
{
fstream f,g;
unsigned long int p,i,zero=0,x;
f.open("fact.in",ios::in);
f>>p;
f.close();
g.open("fact.out",ios::out);
if(p==0){ g<<1; g.close(); return 0; }
i=5;
while(zero<p)
{ x=i;
while(x%10==0||x%10==5)
{ x=x/5;
zero++;
}
i+=5;
}
if(p==zero) g<<i-5;
else
g<<-1;
g.close();
return 0;
}