Cod sursa(job #291568)
Utilizator | Vlasceanu Razvan vlasceanu | Data | 30 martie 2009 00:03:09 |
---|---|---|---|
Problema | Factorial | Scor | 10 |
Compilator | cpp | Status | done |
Runda | Arhiva de probleme | Marime | 0.51 kb |
#include <cstdlib>
#include <iostream>
#include <limits>
using namespace std;
unsigned long int Ev(unsigned long int p)
{
if (p==0) return 1;
unsigned long int aux=5;
unsigned long int rez = p*5;
while(aux*5<p*5)
{rez-=5;
aux*=5;}
return rez;
}
int main(int argc, char *argv[])
{
long unsigned int pp;
freopen("fact.in","r",stdin);
cin >> pp;
fclose(stdin);
freopen("fact.out","w",stdout);
cout<<Ev(pp);
fclose(stdout);
return EXIT_SUCCESS;
}