$\mathcal{Vocanda}$

摘要： 题目 Chris家的电话铃响起了，里面传出了Chris的老师焦急的声音：“喂，是Chris的家长吗？你们的孩子又没来上课，不想参加考试了吗？”一听说要考试，Chris的父母就心急如焚，他们决定在尽量短的时间内找到Chris。他们告诉Chris的老师：“根据以往的经验，Chris现在必然躲在朋友She 阅读全文

摘要： 题目 In a village called Byteville, there are houses connected with N-1 roads. For each pair of houses, there is a unique way to get from one to another 阅读全文

摘要： 题目 Farmer John has arranged his N (1 ≤ N ≤ 5,000) cows in a row and many of them are facing forward, like good cows. Some of them are facing backward, 阅读全文

摘要： 题目 某售货员小T要到若干城镇去推销商品,由于该地区是交通不便的山区，任意两个城镇 之间都只有唯一的可能经过其它城镇的路线。 小T 可以准确地估计出在每个城镇停留的净收 益。这些净收益可能是负数，即推销商品的利润抵不上花费。由于交通不便，小T经过每个 城镇都需要停留，在每个城镇的停留次数与在该地的净 阅读全文

摘要： 题目 NEKO#ΦωΦ has just got a new maze game on her PC! The game's main puzzle is a maze, in the forms of a 2×n rectangle grid. NEKO's task is to lead a N 阅读全文