摘要：
Vasya has decided to build a zip-line on trees of a nearby forest. He wants the line to be as long as possible but he doesn't remember exactly the hei 阅读全文
posted @ 2018-08-31 21:49
nimphy
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摘要：
Vasya's telephone contains n photos. Photo number 1 is currently opened on the phone. It is allowed to move left and right to the adjacent photo by sw 阅读全文
posted @ 2018-08-31 21:30
nimphy
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