Cod sursa(job #1134121)

Utilizator neaRMihai Balalau neaR Data 5 martie 2014 23:58:03
Problema Factorial Scor 75
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.25 kb
Raporteaza aceasta sursa 
#include <iostream>
#include <fstream>
using namespace std;
ifstream f("fact.in");
ofstream g("fact.out");

int main()
{int p,i,a;
f>>p;
a=p/5;
if(p==a+a*5-1) g<<"-1";
else {for(i=5;i<p;i+=5) {a=i; while(a%5==0) {a=a/5; p--;}}
g<<p*5;}
return 0;}