Main.java

import java.awt.*;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        // Print the greeting below.
//        System.out.println("Hello, Java!");

//        Specifier	 Meaning
//            %s	 string (any object — uses its toString)
//            %d	 decimal integer
//            %f	 floating point — defaults to 6 decimals
//            %.2f	 floating point, exactly 2 decimals
//            %5d	 integer right-aligned in 5 columns
//            %-10s	 string left-aligned in 10 columns
//            %n	 newline

//        Scanner input = new Scanner(System.in);
//        int firstNum = input.nextInt();
//        int secondNum = input.nextInt();
//        input.close();
//        System.out.println(firstNum + secondNum);

//        Scanner input = new Scanner(System.in);
//        int width = input.nextInt();
//        int height = input.nextInt();
//        input.close();
//        System.out.println(width * height);

//        Scanner input = new Scanner(System.in);
//        String sentence = input.nextLine();
//        input.close();
//        System.out.println(sentence.toUpperCase());

//        Scanner input = new Scanner(System.in);
//        String name = input.nextLine();
//        int age = input.nextInt();
//        input.close();
//        System.out.println("Hi, " + name + "! You are " + age + " years old.");

//        Scanner input = new Scanner(System.in);
//        int number = input.nextInt();
//        input.close();
//        fizzbuzz(number);

//        Scanner input = new Scanner(System.in);
//        int number = input.nextInt();
//        input.close();
//        System.out.println(sumUpto(number));

//        Scanner input = new Scanner(System.in);
//        int number = input.nextInt();
//        input.close();
//        System.out.println(square(number));

        Scanner input = new Scanner(System.in);
        int x1 = input.nextInt();
        int y1 = input.nextInt();
        int x2 = input.nextInt();
        int y2 = input.nextInt();
        input.close();

        System.out.println(pointDistanceSquared(x1, y1, x2, y2));
    }

    static void fizzbuzz(int number){
        if (number % 15 == 0) {System.out.println("FizzBuzz");}
        else if (number % 3 == 0) {System.out.println("Fizz");}
        else if (number % 5 == 0) System.out.println("Buzz");

        else System.out.println(number);
    }

    static int sumUpto(int number){
        int sum = 0;
        for (int i = 1; i <= number; i++){
            sum += i;
        }

        return sum;
    }

    static int square(int n) {
         return n * n;
    }

    static int pointDistanceSquared(int x1, int y1, int x2, int y2) {
        int dx = x2 - x1;
        int dy = y2 - y1;
        return dx * dx + dy * dy;
    }
}