leetcode

Given an array of size n, find the majority element. The majority element is the element that appear…

Given an array of integers and an integer k, find out whether there are two distinct indices i and j…

Given an array of integers, find if the array contains any duplicates. Your function should return t…

Given an array of integers that is already sorted in ascending order, find two numbers such that the…

Say you have an array for which the ith element is the price of a given stock on day i. Design an al…

Say you have an array for which the ith element is the price of a given stock on day i. If you were …

Given two sorted integer arrays nums1 and nums2, merge nums2 into nums1 as one sorted array. Note:Yo…

Given an array of integers, every element appears twice except for one. Find that single one. Note:Y…

Given a sorted array, remove the duplicates in place such that each element appear only once and ret…

Given an array and a value, remove all instances of that value in place and return the new length. D…

Given a sorted array and a target value, return the index if the target is found. If not, return the…

Given a non-empty string check if it can be constructed by taking a substring of it and appending mu…

Given a sequence of words, check whether it forms a valid word square. A sequence of words forms a v…

Given two non-negative integers num1 and num2 represented as string, return the sum of num1 and num2…

Given a string, you need to reverse the order of characters in each word within a sentence while sti…