840. Magic Squares In Grid
A 3 x 3 magic square is a 3 x 3 grid filled with distinct numbers from 1 to 9 such that each row, column, and both diagonals all […]
Maximize Array Value After Rearrangement
Given an array arr of n integers. Your task is to write a program to find the maximum value of ∑arr[i]*i, where i = 0,
885. Spiral Matrix III
You start at the cell (rStart, cStart) of an rows x cols grid facing east. The northwest corner is at the first row and
273. Integer to English Words
Convert a non-negative integer num to its English words representation. Example 1: Input: num = 123 Output: “One Hundred Twenty Three” Example
K-th element of two Arrays
Given two sorted arrays arr1 and arr2 and an element k. The task is to find the element that would be at the kth position of
3016. Minimum Number of Pushes to Type Word II
You are given a string word containing lowercase English letters. Telephone keypads have keys mapped with distinct collections of lowercase English letters, which can
Validate an IP Address
You are given a string str in the form of an IPv4 Address. Your task is to validate an IPv4 Address, if
2053. Kth Distinct String in an Array
A distinct string is a string that is present only once in an array. Given an array of strings arr, and an integer k, return the kth distinct string present
Bottom View of Binary Tree
Given a binary tree, return an array where elements represent the bottom view of the binary tree from left to right.
1508. Range Sum of Sorted Subarray Sums
You are given the array nums consisting of n positive integers. You computed the sum of all non-empty continuous subarrays from the array and
N meetings in one room
You are given timings of n meetings in the form of (start[i], end[i]) where start[i] is the start time of meeting i and end[i] is the finish time