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摘要：   作为体育委员，C君负责这次运动会仪仗队的训练。仪仗队是由学生组成的N * N的方阵，为了保证队伍在行进中整齐划一，C君会跟在仪仗队的左后方，根据其视线所及的学生人数来判断队伍是否整齐(如下图).现在，C君希望你告诉他队伍整齐时能看到的学生人数。 共一个数N。 共一个数，即C君应看到的学生人数。 阅读全文

摘要： C. Not Equal on a Segment You are given array a with n integers and m queries. The i-th query is given with three integers li, ri, xi. For the i-th qu 阅读全文

摘要： D. Rat Kwesh and Cheese Wet Shark asked Rat Kwesh to generate three positive real numbers x, y and z, from 0.1 to 200.0, inclusive. Wet Krash wants to 阅读全文

摘要： C. Wet Shark and Flowers There are n sharks who grow flowers for Wet Shark. They are all sitting around the table, such that sharks i and i + 1 are ne 阅读全文

摘要： B. Wet Shark and Bishops Today, Wet Shark is given n bishops on a 1000 by 1000 grid. Both rows and columns of the grid are numbered from 1 to 1000. Ro 阅读全文

摘要： A. Wet Shark and Odd and Even Today, Wet Shark is given n integers. Using any of these integers no more than once, Wet Shark wants to get maximum poss 阅读全文

摘要： C. Constellation Cat Noku has obtained a map of the night sky. On this map, he found a constellation with n stars numbered from 1 to n. For each i, th 阅读全文

摘要： B. Guess the Permutation Bob has a permutation of integers from 1 to n. Denote this permutation as p. The i-th element of p will be denoted as pi. For 阅读全文

摘要： A. Slime Combining Your friend recently gave you some slimes for your birthday. You have n slimes all initially with value 1. You are going to play a 阅读全文