Create 2433-find-the-original-array-of-prefix-xor.js

Author: everthis

2433-find-the-original-array-of-prefix-xor.js

@@ -0,0 +1,20 @@
+/**
+ * @param {number[]} pref
+ * @return {number[]}
+ */
+const findArray = function(pref) {
+  const n = pref.length
+  if(n == 0 || n==1) return pref
+  const res = [pref[0]]
+  let xor = pref[0]
+  for(let i = 1; i < n; i++) {
+     const v = pref[i]
+     // v = xor ^ e
+     // v ^ xor = e
+     const tmp = v ^ xor
+     res.push(tmp)
+     xor = xor ^ tmp
+  }
+  
+  return res
+};