Cod sursa(job #1134104)
| Utilizator |  Mihai Balalau neaR |
Data | 5 martie 2014 23:19:00 |
|---|---|---|---|
| Problema | Factorial | Scor | 30 |
| Compilator | cpp | Status | done |
| Runda | Arhiva de probleme | Marime | 0.28 kb |
#include <iostream>
#include <fstream>
using namespace std;
ifstream f("fact.in");
ofstream g("fact.out");
int main()
{int p,i,a,n;
f>>p;
n=0;
for(i=1;i<=p;i++) {a=i; while(a%5==0) {a=a/5; p--;n++;}}
if(n%5==0 && n>4) g<<"-1";
else g<<p*5;
//cout<<n<<" "<<p;
return 0;}
