Cod sursa(job #1073717)
Utilizator | Marin Cristian MyrmekoMe | Data | 6 ianuarie 2014 19:08:23 |
---|---|---|---|
Problema | Factorial | Scor | 100 |
Compilator | cpp | Status | done |
Runda | Arhiva de probleme | Marime | 0.7 kb |
#include <iostream>
#include<stdio.h>
#include<fstream>
using namespace std;
int zerouri(int n)
{
int k=0;
while (n>0)
{
n/=5;
k+=n;
}
return k;
}
int main()
{
ifstream f("fact.in");
ofstream g("fact.out");
int p,n=0,k,i;
f>>p;
k=5*5*5*5*5*5*5*5*5*5*5*5;
i=12;
while (i>=0)
{
n+=k;
if (zerouri(n)==p) i=-3;
if (zerouri(n)>p)
{
i--;
n-=k;
k/=5;
}
}
if (zerouri(n)==p) g<<n; else g<<"-1";
return 0;
}