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[LeetCode] 2516. Take K of Each Character From Left and Right

You are given a string s consisting of the characters ‘a’, ‘b’, and ‘c’ and a non-negative integer k. Each minute, you may take either the leftmost character of s, or the rightmost character of s. Ret

2024-11-20

#leetcode #hashmap #java #sliding window #string

[LeetCode] 1652. Defuse the Bomb

You have a bomb to defuse, and your time is running out! Your informer will provide you with a circular array code of length of n and a key k. To decrypt the code, you must replace every number. All t

2024-11-18

#leetcode #array #java #sliding window

[LeetCode] 661. Image Smoother

An image smoother is a filter of the size 3 x 3 that can be applied to each cell of an image by rounding down the average of the cell and the eight surrounding cells (i.e., the average of the nine cel

2024-11-17

#leetcode #array #java #matrix

[LeetCode] 911. Online Election

You are given two integer arrays persons and times. In an election, the ith vote was cast for persons[i] at time times[i]. For each query at a time t, find the person that was leading the election at

2024-11-15

#leetcode #array #hashmap #java #binary search #design

[LeetCode] 1146. Snapshot Array

Implement a SnapshotArray that supports the following interface:SnapshotArray(int length) initializes an array-like data structure with the given length. Initially, each element equals 0.void set(inde

2024-11-14

#leetcode #array #hashmap #java #treemap #binary search #design

[LeetCode] 2080. Range Frequency Queries

Design a data structure to find the frequency of a given value in a given subarray. The frequency of a value in a subarray is the number of occurrences of that value in the subarray. Implement the Ran

2024-11-14

#leetcode #array #hashmap #java #binary search #design

[LeetCode] 3239. Minimum Number of Flips to Make Binary Grid Palindromic I

You are given an m x n binary matrix grid. A row or column is considered palindromic if its values read the same forward and backward. You can flip any number of cells in grid from 0 to 1, or from 1 t

2024-11-14

#leetcode #array #two pointer #java #matrix

[LeetCode] 2064. Minimized Maximum of Products Distributed to Any Store

You are given an integer n indicating there are n specialty retail stores. There are m product types of varying amounts, which are given as a 0-indexed integer array quantities, where quantities[i] re

2024-11-13

#leetcode #array #java #binary search #binary search on answer

[LeetCode] 1385. Find the Distance Value Between Two Arrays

Given two integer arrays arr1 and arr2, and the integer d, return the distance value between the two arrays. The distance value is defined as the number of elements arr1[i] such that there is not any

2024-11-13

#leetcode #java #sort #binary search

[LeetCode] 2070. Most Beautiful Item for Each Query

You are given a 2D integer array items where items[i] = [pricei, beautyi] denotes the price and beauty of an item respectively. You are also given a 0-indexed integer array queries. For each quer

2024-11-13

#leetcode #array #java #sort #binary search