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Oct 16th, 2019
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  1. package com.company;
  2.  
  3. import java.io.BufferedReader;
  4. import java.io.IOException;
  5. import java.io.InputStreamReader;
  6.  
  7. public class Main {
  8.  
  9. public static void main(String[] args) throws IOException {
  10. BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
  11. int[] arr = new int[100];
  12. for (int i = 0; i < arr.length; i++) {
  13. if (i == 0) {
  14. i = i + 1;
  15. if (i % 2 == 0) {
  16. arr[i] = i;
  17. }
  18. else {
  19. arr[i] = i;
  20. }
  21. }
  22. if (i % 2 == 0) {
  23. arr[i] = i;
  24. }
  25. else {
  26. arr[i] = i;
  27. }
  28. }
  29. int A = Integer.parseInt(reader.readLine());
  30. int B = Integer.parseInt(reader.readLine());
  31. System.out.println(((arr[A] - arr[B]) / 2) * (-1));
  32. }
  33. }
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