Problem Statement Binary Search LeetCode Solution says that – Given an array of integers nums which is sorted in ascending order, and an integer target, write a function to search target in nums. If target exists, then return its index. Otherwise, return -1. You must write an algorithm with O(log n) runtime complexity. Example 1: Input: nums = [-1,0,3,5,9,12], target …
Problem Statement Container With Most Water LeetCode Solution says that – You are given an integer array height of length n. There are n vertical lines are drawn such that the two endpoints of the ith line are (i, 0) and (i, height[i]). Find two lines that together with the x-axis form a container, such that the container …
Problem Statement Reverse Integer LeetCode Solution says that – 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 [-231, 231 – 1], then return 0. Assume the environment does not allow you to store 64-bit integers (signed or unsigned). Example 1: …
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 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 Vertical Order Traversal of Binary Tree LeetCode Solution says – Given the root of a binary tree, calculate the vertical order traversal of the binary tree. For each node at position (row, col), its left and right children will be at positions (row + 1, col – 1) and (row + 1, col + 1) respectively. …
Problem Statement: Rectangle Overlap LeetCode Solution – says that An axis-aligned rectangle is represented as a list, [x1, y1, x2, y2], where (x1, y1) is the coordinate of its bottom-left corner, and (x2, y2) is the coordinate of its top-right corner. Its top and bottom edges are parallel to the X-axis, and its left …
Problem Statement The Add Two Numbers II LeetCode Solution – “Add Two Numbers II” states that two non-empty linked lists represent two non-negative integers where the most significant digit comes first and each node contains exactly one digit. We need to add the two numbers and return the sum as …
Problem Statement The Different Ways to Add Parentheses LeetCode Solution – “Different Ways to Add Parentheses” states that given a string expression of numbers and operators. We need to return all possible results from computing all different possible ways to group numbers and operators. Return the answer in any order. …
Problem Statement The Longest Substring Without Repeating Characters LeetCode Solution – states that given the string s. We need to find the longest substring without repeating characters. Example: Input: s = “abcabcbb” Output: 3 Explanation: The longest substring with no characters being repeated is of length 3. The string is: “abc”. Input: s = “bbbbb” …