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Count Negative Numbers in a Sorted Matrix - Array - Easy - LeetCode
Given a m * n matrix grid which is sorted in non-increasing order both row-wise and column-wise. Return the number of negative numbers in grid. Example 1: Input: grid = [[4,3,2,-1],[3…
How Many Numbers Are Smaller Than the Current Number - Array - Easy - LeetCode
Given the array nums, for each nums[i] find out how many numbers in the array are smaller than it. That is, for each num…
Lucky Numbers in a Matrix - Array - Easy - LeetCode
Given a m * n matrix of distinct numbers, return all lucky numbers in the matrix in any order. A lucky number is an ele…
Find the Distance Value Between Two Arrays - Easy - LeetCode
Given two integer arrays arr1 and arr2, and the integer d, return the distance value between the two arrays. The distan…
Shuffle the Array - Easy - LeetCode
Given the array nums consisting of 2n elements in the form [x1,x2,...,xn,y1,y2,...,yn]. Return the array in the form [x…
Create Target Array in the Given Order - Array - Easy - LeetCode
Given two arrays of integers nums and index. Your task is to create target array under the following rules: Initially, …
Groups of Special-Equivalent Strings - Easy - LeetCode
You are given an array A of strings. A move onto S consists of swapping any two even indexed characters of S, or any tw…
Find Lucky Integer in an Array - Easy - LeetCode
Given an array of integers arr, a lucky integer is an integer which has a frequency in the array equal to its value. Re…
Count Largest Group - Array - Easy - LeetCode
Given an integer n. Each number from 1 to n is grouped according to the sum of its digits. Return how many groups…
Minimum Value to Get Positive Step by Step Sum - Array - Easy - LeetCode
Given an array of integers nums, you start with an initial positive value startValue. In each iteration, you calculate …
Kids With the Greatest Number of Candies - Array - Easy - LeetCode
Given the array candies and the integer extraCandies, where candies[i] represents the number of candies that the ith kid…
Make Two Arrays Equal by Reversing Sub-arrays - Easy - LeetCode
Given two integer arrays of equal length target and arr. In one step, you can select any non-empty sub-array of arr and…
Number of Students Doing Homework at a Given Time - Array - Easy - LeetCode
Given two integer arrays startTime and endTime and given an integer queryTime. The ith student started doing their home…
Maximum Product of Two Elements in an Array - Easy - LeetCode
Given the array of integers nums, you will choose two different indices i and j of that array. Return the maximum value …
Roman to Integer - String - Easy - LeetCode
Roman numerals are represented by seven different symbols: I, V, X, L, C, D, and M. Symbol …