leetcode-100-easy

Same Tree

public boolean isSameTree(TreeNode p, TreeNode q) {
    if (p == null && q == null) return true;
    if (p != null && q == null) return false;
    if (p == null && q != null) return false;

    return isSameTree(p.left, q.left) &&
            p.val == q.val &&
            isSameTree(p.right, q.right);
}