Create Replace Elements in an Array.java

Author: varunu28

Medium/Replace Elements in an Array.java

@@ -0,0 +1,14 @@
+class Solution {
+  public int[] arrayChange(int[] nums, int[][] operations) {
+    Map<Integer, Integer> indexMap = new HashMap<>();
+    for (int i = 0; i < nums.length; i++) {
+      indexMap.put(nums[i], i);
+    }
+    for (int[] operation : operations) {
+      int prevElementIdx = indexMap.get(operation[0]);
+      indexMap.put(operation[1], prevElementIdx);
+      nums[prevElementIdx] = operation[1];
+    }
+    return nums;
+  }
+}