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May 22nd, 2018
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  1. class Solution {
  2. public int[] intersection(int[] nums1, int[] nums2) {
  3. Arrays.sort(nums1);
  4. Arrays.sort(nums2);
  5. List<Integer> res = new ArrayList<>();
  6. int i = 0;
  7. int j = 0;
  8.  
  9. while (i < nums1.length && j < nums2.length) {
  10. if (nums1[i] < nums2[j]) i++;
  11. else if (nums1[i] > nums2[j]) j++;
  12. else {
  13. res.add(nums1[i]);
  14. do {
  15. i++;
  16. } while (i < nums1.length && nums1[i] == nums1[i - 1]);
  17. do{
  18. j++;
  19. } while (j < nums2.length && nums2[j] == nums2[j - 1]);
  20. }
  21. }
  22.  
  23. int[] result = new int[res.size()];
  24.  
  25. for (int k = 0; k < result.length; k++) result[k] = res.get(k);
  26.  
  27. return result;
  28. }
  29. }
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