Create 0951-flip-equivalent-binary-trees.kt

Author: a93a

kotlin/0951-flip-equivalent-binary-trees.kt

@@ -0,0 +1,16 @@
+class Solution {
+    fun flipEquiv(r1: TreeNode?, r2: TreeNode?): Boolean {
+        if (r1 == null || r2 == null) {
+            return if (r1 == null && r2 == null) true else false  
+        }
+        if (r1.value != r2.value)
+            return false
+        
+        val a = flipEquiv(r1.left, r2.left) && flipEquiv(r1.right, r2.right)
+        return a ||flipEquiv(r1.left, r2.right) && flipEquiv(r1.right, r2.left)
+
+    }
+
+    val TreeNode.value
+        get()= this.`val`
+}