Weak Characters

public int NumberOfWeakCharacters(int[][] properties)
{
    var count = 0;

    for (var i = 0; i < properties.Length - 1; i++)
    {
        for (var j = i + 1; j < properties.Length; j++)
        {
            if ((properties[i][0] < properties[j][0] &&
                properties[i][1] < properties[j][1]) ||
                (properties[i][0] > properties[j][0] &&
                properties[i][1] > properties[j][1]))
            {
                count++;
            }
        }
    }
    return count;
}