[LeetCode 1429] First Unique Number
[LeetCode 105] Construct Binary Tree from Preorder and Inorder Traversal
January 20, 2021
[LeetCode 996] Number of Squareful Arrays
[LeetCode 210] Course Schedule II
[LeetCode 990] Satisfiability of Equality Equations
Given an array equations of strings that represent relationships between variables, each string equations[i] has length 4 and takes ...
[LeetCode 207] Course Schedule
There are a total of numCourses courses you have to take, labeled from 0 to numCourses-1. Some courses ...
[LeetCode 133] Clone Graph
Given a reference of a node in a connected undirected graph. Return a deep copy (clone) of ...
[LeetCode 1494] Parallel Courses II
Given the integer n representing the number of courses at some university labeled ...
[LeetCode 928] Minimize Malware Spread II
(This problem is the same as Minimize Malware Spread, with the differences bolded.) In ...
[LeetCode 1267] Count Servers that Communicate
You are given a map of a server center, represented as a m * ...
[LeetCode 743] Network Delay Time
https://leetcode.com/problems/network-delay-time/ There are N network nodes, labelled 1 to N. Given times, a list of travel times as directed edges times[i] = ...
[LeetCode 765] Couples Holding Hands
N couples sit in 2N seats arranged in a row and want to ...
[LeetCode 886] Possible Bipartition
Given a set of N people (numbered 1, 2, ..., N), we would like to split ...
[HackerRank] Climbing the Leaderboard
1631: Path With Minimum Effort
[LeetCode 1595] Minimum Cost to Connect Two Groups of Points
[LeetCode 508] Most Frequent Subtree Sum
[LeetCode 1010] Pairs of Songs With Total Durations Divisible by 60
Breadth First Search
Computer Science Topics
Depth First Search
Lost your password?
[LeetCode 503] Next Greater Element II
[LeetCode 2] Add two numbers
[LeetCode 48] Rotate Image