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[LeetCode] 2406. Divide Intervals Into Minimum Number of Groups

You are given a 2D integer array intervals where intervals[i] = [left, right] represents the inclusive interval [left, right]. You have to divide the intervals into one or more groups such that e

2024-10-12

#leetcode #array #java #greedy #sort #heap #line sweep

[LeetCode] 962. Maximum Width Ramp

A ramp in an integer array nums is a pair (i, j) for which i < j and nums[i] <= nums[j]. The width of such a ramp is j - i. Given an integer array nums, return the maximum width of a ramp i

2024-10-10

#leetcode #array #java #stack #monotonic stack

[LeetCode] 2491. Divide Players Into Teams of Equal Skill

You are given a positive integer array skill of even length n where skill[i] denotes the skill of the ith player. Divide the players into n / 2 teams of size 2 such that the total skill of each t

2024-10-04

#leetcode #array #two pointer #java

[LeetCode] 1497. Check If Array Pairs Are Divisible by k

Given an array of integers arr of even length n and an integer k. We want to divide the array into exactly n / 2 pairs such that the sum of each pair is divisible by k. Return true If you can fin

2024-10-01

#leetcode #array #hashmap #java #math

[LeetCode] 641. Design Circular Deque

Design your implementation of the circular double-ended queue (deque). Implement the MyCircularDeque class:MyCircularDeque(int k) Initializes the deque with a maximum size of k.boolean insertFront() A

2024-09-28

#leetcode #java #design #linked list #queue

[LeetCode] 2414. Length of the Longest Alphabetical Continuous Substring

An alphabetical continuous string is a string consisting of consecutive letters in the alphabet. In other words, it is any substring of the string “abcdefghijklmnopqrstuvwxyz”. For example, “abc” is a

2024-09-19

#leetcode #two pointer #java #string

[LeetCode] 884. Uncommon Words from Two Sentences

A sentence is a string of single-space separated words where each word consists only of lowercase letters. A word is uncommon if it appears exactly once in one of the sentences, and does not appear in

2024-09-17

#leetcode #hashmap #java #string

[LeetCode] 2419. Longest Subarray With Maximum Bitwise AND

You are given an integer array nums of size n. Consider a non-empty subarray from nums that has the maximum possible bitwise AND. In other words, let k be the maximum value of the bitwise AND of any s

2024-09-14

#leetcode #array #java #bit manipulation

[LeetCode] 2326. Spiral Matrix IV

You are given two integers m and n, which represent the dimensions of a matrix. You are also given the head of a linked list of integers. Generate an m x n matrix that contains the integers in the lin

2024-09-14

#leetcode #array #java #matrix #linked list #simulation

[LeetCode] 885. Spiral Matrix III

You start at the cell (rStart, cStart) of an rows x cols grid facing east. The northwest corner is at the first row and column in the grid, and the southeast corner is at the last row and column. You

2024-09-13

#leetcode #array #java #matrix #simulation