My thoughts

來源: endofsuburbia 2016-06-26 22:48:34 [] [博客] [舊帖] [給我悄悄話] 本文已被閱讀: 次 (403 bytes)
回答: Help needed to solve this one!gw882016-06-23 21:29:26

1. None of the dots can be at corner, since 2 dots cannot cover size 5 triangle.

2. We need one dot on every edge. Suppose there was no dot on the bottom edge, each dot can color 2 cells on the edge. 3 dots can cover 6 cells. But there are 7 cells on the edge.

3. Rotate triangle by 120 degrees and you get the same. So the solution is most likely symmetric. 

請您先登陸,再發跟帖!

發現Adblock插件

如要繼續瀏覽
請支持本站 請務必在本站關閉/移除任何Adblock

關閉Adblock後 請點擊

請參考如何關閉Adblock/Adblock plus

安裝Adblock plus用戶請點擊瀏覽器圖標
選擇“Disable on www.wenxuecity.com”

安裝Adblock用戶請點擊圖標
選擇“don't run on pages on this domain”