Runtime0 msBeats100%
Memory40 MBBeats62.93%

class Solution {
    public boolean isSameTree(TreeNode p, TreeNode q) {
        if(p==null&&q==null) return true;
        if(p==null||q==null) return false;
        if(p.val!=q.val) return false;
        
        return isSameTree(p.left, q.left) && isSameTree(p.right, q.right);
    }
}