Cod sursa(job #1712997)

Utilizator paubricPaul Bricman paubric Data 4 iunie 2016 14:34:56
Problema Factorial Scor 0
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.32 kb
Raporteaza aceasta sursa 
#include <iostream>

using namespace std;

int nzero(int x)
{
     int ans=0,p5=5;
     while(x>=p5)
     {
         ans+=x/p5;
         p5=p5*5;
     }
     return ans;
}

int main()
{
    int p,n=1;
    cin>>p;
    while(nzero(n)<p)n++;
    if (nzero(n)==p) cout << n;
    else cout <<-1;
    return 0;
}