Problem Statement The Reveal Cards In Increasing Order Leetcode Solution – Given an integer Array named “deck”. In this deck of cards, every card has a unique integer. The integer on the i card is deck[i]. Order the deck in any order and all the cards start face down (unrevealed) …
Problem Statement Find K Closest Elements LeetCode Solution – Given a sorted integer array arr, two integers k and x, return the k closest integers to x in the array. The result should also be sorted in ascending order. An integer a is closer to x than an integer b if: |a – x| < |b – x|, or |a – x| == |b – …
Problem Statement Sort Colors LeetCode Solution – Given an array nums with n objects colored red, white, or blue, sort them in-place so that objects of the same color are adjacent, with the colors in the order red, white, and blue. We will use the integers 0, 1, and 2 to represent the color red, white, and blue, respectively. …
Problem Statement “Maximum Side Length of a Square with Sum Less than or Equal to Threshold,” says that a m x n matrix mat and an integer threshold are given, return the maximum side-length of a square with a sum less than or equal to threshold or return 0 if there is no such square. Example 1: Input: …
Problem Statement Longest Common Subsequence LeetCode Solution – Given two strings text1 and text2, return the length of their longest common subsequence. If there is no common subsequence, return 0. A subsequence of a string is a new string generated from the original string with some characters (can be none) deleted without changing the relative order of the remaining …
Problem Statement Range Sum Query 2D – Immutable LeetCode Solution – Given a 2D matrix, handle multiple queries of the following type: Calculate the sum of the elements of the matrix inside the rectangle defined by its upper left corner (row1, col1) and lower right corner (row2, col2). Implement the NumMatrix class: NumMatrix(int[][] …
Problem Statement Palindrome Number LeetCode Solution says that – Given an integer x, return true if x is palindrome integer. An integer is a palindrome when it reads the same backward as forward. For example, 121 is a palindrome while 123 is not. Example 1: Input: x = 121 Output: true Explanation: 121 reads as 121 from left to right …
Problem Statement Count Sub Islands LeetCode Solution says that grid1 and grid2 contain only 0‘s (representing water) and 1‘s (representing land). The island means the group of 1’s connected 4 directionally. An island in grid2 is considered a sub-island if there is an island in grid1 that contains all the cells that make …
Problem Statement Continuous Subarray Sum LeetCode Solution – Given an integer array nums and an integer k, return true if nums has a continuous subarray of the size of at least two whose elements sum up to a multiple of k, or false otherwise. An integer x is a multiple of k if there exists an integer n such that x = n * k. 0 is always a …
Problem Statement Find the Winner of the Circular Game LeetCode Solution – There are n friends that are playing a game. The friends are sitting in a circle and are numbered from 1 to n in clockwise order. More formally, moving clockwise from the ith friend brings you to the …