2015年Bebras挑战练习题-Beaver Dam（海狸水坝）

The Birchtree family needs to water their fields. Only the fields with flowers need to be watered. The other fields must remain dry.

白桦树一家需要给他们的田地浇水。只有种着花的田地需要浇水，其他的田地必须保持干燥。

Question: 问题:

Help the Birchtree family produce a plan by clicking on the gates to open or close them.

点击大门将其打开或关闭，帮助白桦树一家制定一个计划。

Provide a solution where water only flows to the fields with flowers in.

提供一种解决方案，让水只流向种有花的田地。

(Note: Although the gates will open and close, the water will not flow as this would make the problem far too easy!)

（注意：尽管闸门会开合，但水不会流动，因为那样会使问题变得太简单了！）

 

 

 

Explanation 解释