确实秒；我提供一个笨点的办法

来源: 于 2026-02-04 17:49:42 [旧帖] [给我悄悄话] 本文已被阅读：次

Suppose large rectangle is x wide, y high.

Black area * 2= 3x+4y+(x-4)(y-3) = xy+12=112+12=124

green area = 112-124/2=112-62=50