diff --git a/coding_interviews/leetcode/medium/find-the-original-array-of-prefix-xor/find-the-original-array-of-prefix-xor.js b/coding_interviews/leetcode/medium/find-the-original-array-of-prefix-xor/find-the-original-array-of-prefix-xor.js
new file mode 100644
index 0000000..63dd048
--- /dev/null
+++ b/coding_interviews/leetcode/medium/find-the-original-array-of-prefix-xor/find-the-original-array-of-prefix-xor.js
@@ -0,0 +1,9 @@
+function findArray(pref) {
+  let output = [pref[0]];
+
+  for (let index = 1; index < pref.length; index++) {
+    output.push(pref[index - 1] ^ pref[index]);
+  }
+
+  return output;
+}