Two positive integers ♀ and ♂ satisfy: ♀=♂*♂+2*♂+1. For example: when ♂=3, ♀=3*3+2*3+1=16. Then, when ♀=36, ♂=how much.
两个正整数♀、♂满足：♀=♂*♂+2*♂+1．例如：当♂=3时，♀=3*3+2*3+1=16．那么，当♀=36时，♂=多少．
<gadget id="calculator">6 - 1</gadget>
<output>5</output>

<result>5</result>