C# solution


  • 0
    1

    if (p ==null && q == null)
    {
    return true;
    }
    if (p == null || q == null)
    {
    return false;
    }
    if (p.val == q.val)
    {
    return IsSameTree(p.left, q.left) && IsSameTree(p.right, q.right);
    }
    else
    {
    return false;
    }


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