判断题 1.The inorder traversal sequence of an AVL tree must be in sorted (non-decreasing) order. T F 根据二叉搜索树性质,中序遍历一定是有序的,而且是递增的. 2.Insert 1, 2, 3, 4, 5, and 6 one by one into an initially empty AVL tree. Then the preorder traversal sequence o
You are given a tree with N nodes. The tree nodes are numbered from 1 to N and have colors C1, C2,. . . , CN initially. You have to handle M instructions on the tree of the following forms:• 0 u c: Change the color of node u to c.• 1 u v: Output the
题目链接:https://vjudge.net/problem/CodeForces-960F You are given a directed graph with n nodes and m edges, with all edges having a certain weight. There might be multiple edges and self loops, and the graph can also be disconnected. You need to choose
题目描述: Description This task is very simple. Given a string S of length n and q queries each query is on the format i j k which means sort the substring consisting of the characters from i to j in non-decreasing order if k = 1 or in non-increasing ord
题意: 给你N个数,q组操作,操作有两种,查询和改变,查询就是查询当前的这个数上有多少,更改是给你a b k c,每次从a到b,每隔k的数更改一次,之间的数不更改,就相当于跳着更新. 思路:(别人的) (i - a) % k == 0 等价于 i % k == a % k 一共有10中情况 还有枚举所有情况中的小情况 (1)1 2 3 4 5 6 7 8 9..... (2)1 3 5 7 9 11 13 ...... 2 4 6 8
R2D2 and Droid Army time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output An army of n droids is lined up in one row. Each droid is described by m integers a1, a2, -, am, where ai is the number