怎么看怎么这么别扭呢?
he starts from the leftmost point, then he goes strictly left to right to the rightmost point, and then he goes strictly right back to the starting point.
这说的是个啥啊!从最左点从左到又,"stricktly"!!!!到最又点.然后又,"stricktly"回到最左点.好啊.这还用算么?最大边长乘2得了.

看看例子,居然是走的三边.2+2倍根5.简直没话说了.

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