```csharp
using System;
class Program
{
static void Main()
{
Console.WriteLine("Introduceti dimensiunile camerei (N x M mp):");
Console.Write("N: ");
double N = Convert.ToDouble(Console.ReadLine());
Console.Write("M: ");
double M = Convert.ToDouble(Console.ReadLine());
Console.WriteLine("Introduceti dimensiunile unei placi de parchet (A x B mp):");
Console.Write("A: ");
double A = Convert.ToDouble(Console.ReadLine());
Console.Write("B: ");
double B = Convert.ToDouble(Console.ReadLine());
double cameraSurface = N * M;
double tileSurface = A * B;
double lossPercentage = 0.15;
double totalTilesNeeded = cameraSurface / (tileSurface * (1 - lossPercentage));
Console.WriteLine($"Este nevoie de {Math.Ceiling(totalTilesNeeded)} placi de parchet pentru a acoperi camera.");
}
}
```
