Create 1734-decode-xored-permutation.js

Author: everthis

1734-decode-xored-permutation.js

@@ -0,0 +1,22 @@
+/**
+ * @param {number[]} encoded
+ * @return {number[]}
+ */
+const decode = function(A) {
+    let i;
+    let n = A.length + 1;
+    let f = 0;
+    const res = [];
+    for(i=1;i<n+1;i++){
+      f ^= i;
+    }
+    for(i=1;i<n-1;i+=2){
+      f ^= A[i];
+    }
+    res.push(f);
+    for(i=1;i<n;i++){
+      f ^= A[i-1];
+      res.push(f);
+    }
+    return res;    
+};