How many triangles have side lengths that are integers and whose maximum side length is 5?
边长为整数并且最大边长是5的三角形共有多少个．
<gadget id="calculator">1 - 2</gadget>
<output>-1</output>

<gadget id="calculator">4 + 3 + 2 + 1 + (-1)</gadget>
<output>9</output>

<result>9</result>