Cod sursa(job #1546720)
Utilizator | Bogdan Pop Bodo171 | Data | 8 decembrie 2015 17:28:30 |
---|---|---|---|
Problema | Factorial | Scor | 5 |
Compilator | cpp | Status | done |
Runda | Arhiva de probleme | Marime | 0.28 kb |
#include <iostream>
#include<fstream>
using namespace std;
int i,n,x;
int main()
{
ifstream f("fact.in");
ofstream g("fact.out");
f>>n;
i=1;
while(i<n)
{
x=i;
while(x%5==0) {i=i+1;x=x/5;}
i++;
}
if(i==n) g<<i*5;
else g<<-1;
f.close();
g.close();
return 0;
}