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Problem Description The harmonic value of the permutation p1,p2,⋯pn is ∑n−1i=1gcd(pi.pi+1)∑_{i=1}^{n−1}gcd(p_i.p_{i+1})Mr. Frog is wondering about the permutation whose harmonic value is the strictly

Triangle Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/65536 K (Java/Others) Total Submission(s): 338 Accepted Submission(s): 229Problem Description Mr. Frog has n sticks, whose l

Problem Description Long long ago, there were n adorkable GT. Divided into two groups, they were playing games together, forming a column. The i−th GT would randomly get a value of ability bi. At the

Problem Description There is a complete binary tree with N nodes.The subtree of the node i has Ai nodes.How many distinct numbers are there of Ai?Input There are multiple test cases, no more than 100

You are given a table consisting of n rows and m columns.Numbers in each row form a permutation of integers from 1 to m.You are allowed to pick two elements in one row and swap them, but no more than o

Problem Description There is a graph of n vertices which are indexed from 1 to n. For any pair of different vertices, the weight of the edge between them is the least common multiple of their indexes.

Description 北宋末年，奸臣当道，宦官掌权，外侮日亟，辽军再犯。时下战火连连，烽烟四起，哀鸿遍野，民不聊生，又有众多能人异士群起而反，天下志士云集响应,景粮影从。 值此危急存亡之秋，在一个与世隔绝的地方—MCA山上一位江湖人称<英雄哪里出来>的人正在为抗击辽贼研究剑法，终于于一雷电交加之夜精确计算出了荡剑回锋的剑气伤害公式。定义 f(x, y, m, n) = sqrt(x*x + y