Cod sursa(job #677351)
| Utilizator |  Vlad Neacsu vaneacsu |
Data | 10 februarie 2012 01:19:22 |
|---|---|---|---|
| Problema | Factorial | Scor | 5 |
| Compilator | cpp | Status | done |
| Runda | Arhiva de probleme | Marime | 0.26 kb |
#include <fstream>
#include <math.h>
using namespace std;
int main()
{ifstream fin("fact.in");
ofstream fout("fact.out");
int n, p;
fin>>p;
n=5*(p-(p+1)/5-(p+1)/25-(p+1)/125-(p+1)/625-(p+1)/3125-(p+1)/15625-(p+1)/78125-(p+1)/390625);
fout<<n;
return 0;
}