Uri online judge solution 1007 Difference

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Uri online judge solution 1007 Difference

import java.util.Scanner;
public class Main{
  public static void main(String[] args) {
    Scanner in= new Scanner(System.in);
    int A=in.nextInt();
    int B=in.nextInt();
    int C=in.nextInt();
    int D=in.nextInt();
    int ans=(A*B)-(C*D);
    System.out.println("DIFERENCA = "+ans);   
  }            
}