Cod sursa(job #1546698)
Utilizator | Bogdan Pop Bodo171 | Data | 8 decembrie 2015 17:07:33 |
---|---|---|---|
Problema | Factorial | Scor | 0 |
Compilator | cpp | Status | done |
Runda | Arhiva de probleme | Marime | 0.33 kb |
#include <iostream>
#include<fstream>
using namespace std;
int n,nr,i;
int main()
{
ifstream f("fact.in");
ofstream g("fact.out");
cin>>n;
i=1;
while(i<n)
{
while(i%5==0) {nr=nr+1;i=i/5;}
nr=nr+1;
i=nr;
}
if(i==n) cout<<i*5;
else cout<<-1;
f.close();
g.close();
return 0;
}