Given an integer array nums, find the contiguous subarray (containing at least one number) which has the largest sum and return its sum. Ex…

Given a non-empty 2D array grid of 0's and 1's, an island is a group of 1's (representing land) connected 4-directionally (horizontal or ve…

Given n non-negative integers representing an elevation map where the width of each bar is 1, compute how much water it is able to trap aft…

You are given a map in form of a two-dimensional integer grid where 1 represents land and 0 represents water. Grid cells are connected hori…

Given an array of numbers arr. A sequence of numbers is called an arithmetic progression if the difference between any two consecutive elem…

Given two arrays of integers nums and index. Your task is to create target array under the following rules: Initially target array is empty…

Given a non-negative integer numRows, generate the first numRows of Pascal's triangle. In Pascal's triangle, each number is the sum of the …

Given a triangle, find the minimum path sum from top to bottom. Each step you may move to adjacent numbers on the row below. The minimum pa…

Given two lists of closed intervals, each list of intervals is pairwise disjoint and in sorted order. Return the intersection of these two …