leetcode 1734

leetcode/1734/1734.go

@@ -0,0 +1,19 @@
+func decode(encoded []int) []int {
+    n := len(encoded) + 1
+    perm := make([]int, n)
+
+    abcdefg := 0
+    bcdefg := 0
+    for i := 0; i < n; i++ {
+        abcdefg ^= i + 1
+        if i % 2 == 1 {
+            bcdefg ^= encoded[i]
+        }
+    }
+
+    perm[0] = abcdefg ^ bcdefg
+    for i := 1; i < n; i++ {
+        perm[i] = encoded[i-1] ^ perm[i-1]
+    }
+
+    r