Problem Description Astronomers often examine star maps where stars are represented by points on a plane and each star has Cartesian coordinates. Let the level of a star be an amount of the stars that are not higher and not to the right of the given…
题目链接:https://icpcarchive.ecs.baylor.edu/index.php?option=com_onlinejudge&Itemid=8&page=show_problem&problem=192 给你一个长度为n的数组A,有两种操作,操作一:(S x y) 将A[x]的大小置为y,操作二:(M x y) 求A[x], A[x+1] ... A[y]的和 用一个额外的数组tmp存储数组A,然后将 S x y转换为树状数组的 add x y-tmp[x] #…
题目链接 http://acm.split.hdu.edu.cn/showproblem.php?pid=5877 Problem Description You are given a rooted tree of N nodes, labeled from 1 to N. To the ith node a non-negative value ai is assigned.An ordered pair of nodes (u,v) is said to be weak if (1) u…