鸡兔同笼-鸡兔同笼
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热门回复：
- 小脑不发达啊啊啊啊啊:逃逃，再讲个植树问题？
- 28521570462_bili:actually they are trying to create some kind of hybrid
http://acg.ibilibili.com/cms/yirenzhixia/7.html
