Cod sursa(job #2065236)

Utilizator dianamichesaRosu Diana Michesa dianamichesa Data 13 noiembrie 2017 16:58:23
Problema Factorial Scor 100
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.52 kb
#include <iostream>
#include <fstream>
#include <algorithm>
using namespace std;
ifstream f("fact.in");
ofstream g("fact.out");
const int N=30001,L=30;
int p;
int zero(int p)
{
    int nrz=0;
    while(p>=5){
        nrz+=p/5;
        p/=5;
    }
    return nrz;
}
int f2(int p)
{
    int pas=1<<L;
    int r=0;
    while(pas!=0){
        if(zero(r+pas)<p)
            r+=pas;
        pas/=2;
    }
    return r+1;
}
int main()
{
    f>>p;
    int k=f2(p);
    if(zero(k)==p)
        g<<k;
    else
        g<<-1;
    return 0;
}