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输入:numCourses = 2, prerequisites = [[1,0]]输出:true解释:总共有 2 门课程。学习课程 1 之前,你需要完成课程 0 。这是可能的。 示例2: 输入:numCourses = 2, prerequisites = [[1,0],[0,1]]输出:false解释:总共有 2 门课程。学习课程 1 之前,你需要先完成课程 0 ;并且学习课程 0 之前...
2 Branches21 TagsCode Folders and filesLatest commit yanglbme feat: add solutions to lc problem: No.2434 (#4465) a774cc7· Jun 6, 2025 History10,915 Commits .github chore: update workflows Apr 26, 2025 .husky chore: add configuration file .editorconfig (#3336) Jul 31, 2024 ...
例如,128 是一个自除数,因为128 % 1 == 0,128 % 2 == 0,128 % 8 == 0。 还有,自除数不允许包含 0 。 给定上边界和下边界数字,输出一个列表,列表的元素是边界(含边界)内所有的自除数。 示例1: 输入: 上边界left = 1, 下边界right = 22 输出: [1, 2, 3, 4, 5, 6, 7, 8, 9, 11,...
Notes: It is intended for this problem to be specified vaguely (ie, no given input specs). You are responsible to gather all the input requirements up front. spoilers alert… click to show requirements for atoi. Requirements for atoi: The function first discards as many whitespace characters ...
The problem is to compute the maximum value of Con. 风骨散人Chiam 2020/10/28 3430 最小基因变化 int队列数组搜索字符串 基因序列可以表示为一条由 8 个字符组成的字符串,其中每个字符都是 'A'、'C'、'G' 和 'T' 之一。 狼啸风云 2023/11/30 1650 图论--网络流--最小费用流最大流模板 #...
next permutation: This is a math problem: (1) Find decreased number (2) find the number that is larger than the decreased number (3) swap them (4) reorder the remaining numbers in asending order palindrome permutation: count the number of letters palindrome permutation II: backtracking permuta...
// Solution 1: A hard problem indeed. If there're redundant (s, what you gonna do? Remove it. If it's )s, what then? We can't remove them, because they might be needed later. This is the first challenge. The problem requests we find all possible solutions, that's the second ch...
For the purpose of this problem, we define empty string as valid palindrome. 【解答】注意大小写,注意数字和字母都要算有效字符。 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 ...
Given a linked list, return the node where the cycle begins. If there is no cycle, returnnull. Follow up: Can you solve it without using extra space? Problem Solution Note: 假设循环结点与头结点之间路径长度为k,链表结点长度为n 1. 定义两个指针同时遍历链表,一个步阶为1,另一个步阶为2 ...