Apr 04, 2025 • Leetcode
204. Count Primes
Given an integer n, return the number of prime numbers that are strictly less than n.
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Apr 12, 2025 • Leetcode
Group Anagrams
Given an array of strings strs, group the anagrams together. You can return the answer in any order.
Read more →Apr 03, 2025 • Leetcode
207 Course Schedule
There are a total of numCourses courses you have to take, labeled from 0 to numCourses - 1
Read more →Mar 19, 2025 • Leetcode
152. Maximum Product Subarray
Given an integer array nums, find a subarray that has the largest product, and return the product.
Read more →Mar 16, 2025 • Leetcode
Maximize Distance to Closest Person
You are given an array representing a row of seats where seats[i] = 1 represents a person sitting in the ith seat, and seats[i] = 0 represents that the ith.
Read more →Apr 07, 2025 • Leetcode
461 Hamming Distance
The Hamming distance between two integers is the number of positions at which the corresponding bits are different.
Read more →Apr 01, 2025 • Leetcode
35. Search Insert Position
Given a sorted array of distinct integers and a target value, return the index if the target is found. If not, return the index where it would be if it were.
Read more →Apr 19, 2025 • Leetcode
Detect Capital
We define the usage of capitals in a word to be right when one of the following cases holds:
Read more →Mar 20, 2025 • Leetcode
239. Sliding Window Maximum
You are given an array of integers nums, there is a sliding window of size k.
Read more →Mar 26, 2025 • Leetcode
91. Decode Ways
A message containing letters from A-Z is being encoded to numbers using the following mapping.
Read more →Apr 02, 2025 • Leetcode
367 Valid Perfect Square
Given a positive integer num, return true if num is a perfect square or false otherwise.
Read more →Apr 11, 2025 • Leetcode
Add Binary
Given two binary strings a and b, return their sum as a binary string.
Read more →Apr 09, 2025 • Leetcode
Reverse Integer
Given a signed 32-bit integer x, return x with its digits reversed. If reversing x causes the value to go outside the signed 32-bit integer range.
Read more →Apr 13, 2025 • Leetcode
Count and Say
The count-and-say sequence is a sequence of digit strings defined by the recursive formula
Read more →Apr 08, 2025 • Leetcode
554 Brick Wall
There is a rectangular brick wall in front of you with n rows of bricks. The ith row has some number of bricks each of the same height (i.e., one unit)
Read more →Mar 25, 2025 • Leetcode
2. Add Two Numbers
You are given two non-empty linked lists representing two non-negative integers.
Read more →Apr 18, 2025 • Leetcode
Binary Watch
A binary watch has 4 LEDs on the top to represent the hours (0-11), and 6 LEDs on the bottom to represent the minutes (0-59). Each LED represents a zero or one.
Read more →Mar 28, 2025 • Leetcode
62. Unique Paths
There is a robot on an m x n grid. The robot is initially located at the top-left corner.
Read more →Mar 16, 2025 • Leetcode
Letter Combinations of a Phone Number Problem
Given a string containing digits from 2-9 inclusive, return all possible letter combinations that the number could represent. Return the answer in any order.
Read more →Apr 06, 2025 • Leetcode
221 Maximal Square
Given an m x n binary matrix filled with 0's and 1's, find the largest square containing only 1's and return its area.
Read more →Mar 22, 2025 • Leetcode
526. Beautiful Arrangement
Suppose you have n integers labeled 1 through n. A permutation of those n integers.
Read more →Mar 30, 2025 • Leetcode
50. Pow(x, n)
Implement pow(x, n), which calculates x raised to the power n (i.e., xn).
Read more →Mar 31, 2025 • Leetcode
69. Sqrt(x)
Given a non-negative integer x, return the square root of x rounded down to the nearest intege.
Read more →Apr 16, 2025 • Leetcode
Longest Common Prefix
Write a function to find the longest common prefix string amongst an array of strings.
Read more →Apr 10, 2025 • Leetcode
Best Time to Buy and Sell Stock
You are given an array prices where prices[i] is the price of a given stock on the ith day.
Read more →Mar 18, 2025 • Leetcode
581. Shortest Unsorted Continuous Subarray
Given an integer array nums, you need to find one continuous subarray such that if you only sort this subarray in non-decreasing order.
Read more →Mar 23, 2025 • Leetcode
394. Decode String
The encoding rule is: k[encoded_string], where the encoded_string inside the square brackets is being repeated exactly k
Read more →Mar 16, 2025 • Leetcode
Two Sum Problem
LeetCode Problem 1. Given an array of integers nums and an integer target, return indices of the two numbers such that they add up to target.
Read more →Apr 15, 2025 • Leetcode
Repeated String Match
Given two strings a and b, return the minimum number of times you should repeat string a so that string b is a substring of it.
Read more →Mar 24, 2025 • Leetcode
794. Valid Tic-Tac-Toe State
Given a Tic-Tac-Toe board as a string array board, return true if and only if it is possible to reach
Read more →Apr 17, 2025 • Leetcode
Longest Palindrome
Given a string s which consists of lowercase or uppercase letters, return the length of the longest palindrome that can be built with those letters.
Read more →Apr 05, 2025 • Leetcode
542 Matrix
Given an m x n binary matrix mat, return the distance of the nearest 0 for each cell.
Read more →Mar 21, 2025 • Leetcode
318. Maximum Product of Word Lengths
Given a string array words, return the maximum value of length(word[i]) * length(word[j])
Read more →Mar 27, 2025 • Leetcode
120. Triangle
Given a triangle array, return the minimum path sum from top to bottom
Read more →Apr 14, 2025 • Leetcode
Valid Parentheses
Given a string s containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid.
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