Problem sa zadatkom Broj Razlicitih Duzina Duzi

Pitanja i problemi
1

Ne prolaze mi primeri 4 i 7 i mislim.

kod:C#

using System;
using System.Collections.Generic;

namespace ConsoleApplication1
{
class Duzina_duzi
{
public struct Kordinate
{
public int x;
public int y;
public int z;
}
static double Rastojanje(Kordinate a, Kordinate b)
{
return Math.Sqrt(Math.Pow((a.x - b.x), 2) + Math.Pow((a.y - b.y), 2) + Math.Pow((a.z - b.z), 2));
}
static void Main()
{

        //ucitavanje podataka

        int n = int.Parse(Console.ReadLine());

        HashSet<double> duzine = new HashSet<double>();

        //racunanje duzina

        for (int i = 0; i < n; i++) {
            string[] unos = Console.ReadLine().Split();
            Kordinate a = new Kordinate { x = int.Parse(unos[0]), y = int.Parse(unos[1]), z = int.Parse(unos[2]) };
            Kordinate b = new Kordinate { x = int.Parse(unos[3]), y = int.Parse(unos[4]), z = int.Parse(unos[5]) };
            duzine.Add(Rastojanje(a, b));
        }

        Console.WriteLine(duzine.Count);
    }
}

}

kod C++:

#include
#include <unordered_set>

struct Kordinate {

long x;
long y;
long z;

};

double rastojanje(Kordinate a, Kordinate b)
{
return sqrt(pow((a.x - b.x), 2) + pow((a.y - b.y), 2) + pow((a.z - b.z), 2));
}

int main()
{
int n;
std::cin >> n;

std::unordered_set<double> duzine;

for (int i = 0; i < n; i++) {
	Kordinate a, b;

	std::cin >> a.x;
	std::cin >> a.y;
	std::cin >> a.z;

	std::cin >> b.x;
	std::cin >> b.y;
	std::cin >> b.z;

	duzine.insert(rastojanje(a, b));
}

std::cout << duzine.size();

}