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Re:结合大家的提示,终于看懂这个题了

Posted by xhu_li at 2008-10-25 20:26:13 on Problem 1005
In Reply To:结合大家的提示,终于看懂这个题了 Posted by:wcw at 2008-03-31 21:10:34
> “Fred has learned that the land that is being lost forms a semicircle”给这话误导了,我的理解是“正在丢失”(也就是还没丢失)的陆地“一直”都是半圆。其实这题不是这个意思,准确点表达应该是说正在丢失的陆地是个半“圆环”,第一年的时候内环半径为0,随着地被侵蚀,内环半径不断增加。
> 
> sigh~研究了50分钟阿就为了搞懂这个题~~~
> 
> 看懂了,一次就ac了

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