回複：回複：歐洲奧賽題：棋盤（2.5星）

來源: 於 2009-02-04 06:22:46 [舊帖] [給我悄悄話] 本文已被閱讀：次

How? It seems to me that one need
6+5+4+3+3+2+2+1+1=27,
or 6+5+4*4=27.