/* function TreeNode(x) { this.val = x; this.left = null; this.right = null; } */ function issame(pRoot1,pRoot2){ if(pRoot2===null) return true else if(pRoot1===null) return false else if(pRoot1.val!==pRoot2.val) return false return issame(pRoot1.left,pRoot2.left)&& issame(pRoot1.right,pRoot...