Ответ:

using System;

public class Program

{

public static void Main()

{

Console.WriteLine("Input x: ");

float x = float.Parse(Console.ReadLine());

Console.WriteLine("Input y: ");

float y = float.Parse(Console.ReadLine());

bool answer = false;

if (-1 <= x && x <= 1)

{

if(-2 <= y && y <= 1)

{

if(y <= 0 || y == Math.Abs(x))

{

answer = true;

}

}

}

Console.WriteLine(answer);

}

}