Given that the lengths of the two sides of a triangle are 5 cm and 8 cm, what is the longest length of the third side in cm? (rounded centimeters)
已知三角形的两条边长是5厘米和8厘米，第三条边最长为多少厘米．(取整厘米数)
<gadget id="calculator">8 + 5</gadget>
<output>13</output>

<gadget id="calculator">13 - 1</gadget>
<output>12</output>

<result>12</result>