solves twoout of three

Author: anishLearnsToCode

README.md

@@ -484,7 +484,7 @@
 | 2016 | [Maximum Difference Between Increasing Elements](https://leetcode.com/problems/maximum-difference-between-increasing-elements)                            |                                                   [![Java](assets/java.png)](src/MaximumDifferenceBetweenIncreasingElements.java)                                                    |                                                                                                                                   |
 | 2022 | [Convert 1D Array Into 2D Array](https://leetcode.com/problems/convert-1d-array-into-2d-array)                                                            |                                                            [![Java](assets/java.png)](src/Convert1DArrayInto2DArray.java)                                                            |                                                                                                                                   |
 | 2027 | [Minimum Moves to Convert String](https://leetcode.com/problems/minimum-moves-to-convert-string)                                                          |                                                           [![Java](assets/java.png)](src/MinimumMovesToConvertString.java)                                                           |                                                                                                                                   |
-| 2032 | [Two Out of Three](https://leetcode.com/problems/two-out-of-three)                                                                                        |                                                                                                                                                                                      |                                                                                                                                   |
+| 2032 | [Two Out of Three](https://leetcode.com/problems/two-out-of-three)                                                                                        |                                                                  [![Java](assets/java.png)](src/TwoOutOfThree.java)                                                                  |                                                                                                                                   |
 | 2037 | [Minimum Number of Moves to Seat Everyone](https://leetcode.com/problems/minimum-number-of-moves-to-seat-everyone)                                        |                                                                                                                                                                                      |                                                                                                                                   |
 | 2042 | [Check if Numbers Are Ascending in a Sentence](https://leetcode.com/problems/check-if-numbers-are-ascending-in-a-sentence)                                |                                                                                                                                                                                      |                                                                                                                                   |
 | 2047 | [Number of Valid Words in a Sentence](https://leetcode.com/problems/number-of-valid-words-in-a-sentence)                                                  |                                                                                                                                                                                      |                                                                                                                                   |

src/TwoOutOfThree.java

@@ -0,0 +1,35 @@
+// https://leetcode.com/problems/two-out-of-three
+// T: O(|nums1| + |nums2| + |nums3|)
+// S: O(|nums1| + |nums2| + |nums3|)
+
+import java.util.ArrayList;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+
+public class TwoOutOfThree {
+    public List<Integer> twoOutOfThree(int[] nums1, int[] nums2, int[] nums3) {
+        final Set<Integer> set1 = getElements(nums1);
+        final Set<Integer> set2 = getElements(nums2);
+        final Set<Integer> set3 = getElements(nums3);
+        final Set<Integer> resultElements = new HashSet<>();
+        for (int element : set1) {
+            if (set2.contains(element) || set3.contains(element)) {
+                resultElements.add(element);
+            }
+        }
+        for (int element : set2) {
+            if (set3.contains(element)) resultElements.add(element);
+        }
+//        return resultElements.stream().toList();  // cant be used because LeetCode is still on a previous version of Java
+        return new ArrayList<>(resultElements);
+    }
+
+    private Set<Integer> getElements(int[] array) {
+        final Set<Integer> set = new HashSet<>();
+        for (int element : array) {
+            set.add(element);
+        }
+        return set;
+    }
+}