You are on a business trip and traveling from one city to another. you have a stack of unsorted flight boarding passes. The only departure city and destination city are on the boarding pass. how do you find the first departure city and your final destination city, Example: [Dallas, Austin], [Houston, Dallas], [Austin, Seattle] Output: … Read more Find departure and destination cities from the itinerary
Given an array of numbers, write a program to rank the array elements. Example: Given array: [22, 11, 44, 66, 55] Rank: [2, 1, 3, 5, 4] Given array: [15, 12, 11, 10, 9] Rank: [5, 4, 3, 2, 1] Given array: [10, 20, 30, 40, 50] Rank: [1, 2, 3, 4, 5] Given array: … Read more Rank Array Elements
Given an arithmetic expression which operators, operands and brackets. You need to find out the maximum depth of valid nested parentheses. If parentheses are not valid ( means not well formed ) then return -1. Example: Solution: Input: 1 + (2*((3+4)/(2-1)))/2+56 Maximum Depth: 3 Input: 1 + (4/2) Maximum Depth: 1 Input: ((1)) Maximum Depth: … Read more Maximum Depth of Valid Nested Parentheses
Given a sorted array of integers, Write an algorithm to make all array elements distinct or unique by doing minimum increments. Example: Given Input: [2, 2, 3, 5, 6, 6] Unique Array: [2, 3, 4, 5, 6, 7], Minimum Increments: 3 Explanation: Increment 2 to 3, 3 to 4 and 6 to 7. Given Input: … Read more Minimum Increments to make all array elements unique
The “surpasser” of an element in an array is defined as the number of elements that are to the “right” and bigger than itself. Write an algorithm to Find the maximum surpasser of the array. Example: Input array: [2, 7, 5, 5, 2, 7, 0, 8, 1] The “surpassers” are [5, 1, 2, 2, 2, … Read more Maximum Surpasser in the given array
Given a list of n Jobs with start time, end time and CPU load when it is active at any moment. If all the jobs are running at the same machine then find the maximum CPU load at any time, Also print the time at which the load was maximum. Input: Given a list of … Read more Maximum CPU Load Problem
In school a student gets rewarded if he has an attendance record without being absent for more than once or being late for 3 times continuously. Given a student’s attendance record represented by a string. The record only contains the following three characters: ‘A’ : Absent. ‘L’ : Late. ‘O’ : On-Time. Check whether the … Read more Student Attendance Reward
Interval is defined as [start, end]- the start of the interval to the end of the interval. Given the list of Intervals write an algorithm to find the maximum number of intervals overlapping at any point in time. Example: Given Intervals: [[0,2], [3,7], [1,5], [7,8], [4,6]] Maximum overlapping: 3 Explanation: Interval (4, 5) is overlapping … Read more Count Maximum overlaps in a given list of time intervals
Given a sorted array of integers, write a program to remove duplicates in-place by modifying the given array such that all unique integers will be at the beginning of the array, and do not worry about other indexes after the new length. Example: Given Input: [1, 1, 2, 3, 3] Output: [1, 2, 3, 3, … Read more Remove Duplicates from Sorted Array
Given an array of numbers nums[], write ment a function to replace each element of the array with the greatest element present to its right side. Replace the last element with -1. Example: Input: [4, 5, 2, 25, 13, 16, 8] Output: [25, 25, 25, 16, 16, 8, -1] Input: [4, 5, 2, 25, 13, … Read more Replace Elements with Greatest Element on Right
Given an array of integers and number K, write a program to find the number of pairs which has sum equal to K. Example: int input [] = {6, 3, 2, 9, 2, 2, 2, 1} int K = 4 Output: 7 int input [] = {5, 5, 5, 5} int K = 10 Output: … Read more Count number of pairs which has sum equal to K
Given an array of strings, write a program to count all the similar words. Similar words: Two words are similar if Has spaces in-between or at the end. Ex: “Apple” and ” A pp le” are similar. Has upper or lower cases. Ex: “APPle” and “apple” are similar. Has special characters. Ex: “app%^L&e” and “@@apple” … Read more Count similar words in a given array
Given a bench with n seats and few people sitting, You are going to sit on a vacant seat such that the distance between you and the nearest person to you is maximum. On the beach, the occupied seats are represented by 1 and vacant seats are represented by 0. Example: Input: [1, 0, 1, … Read more Maximum distance from the nearest person.
Given candidates standing for an election, design a data structure that can support the following modules – 1. voteCandidate (candidateName) – Add one vote for the candidate. 2. getTopK ( k ) – This will return top K candidates at that time. It can return more than k candidates if more candidates have the same … Read more Candidate Voting Problem
Given a list of player names and their scores, design a data structure that can support following modules in optimal time- updateEntry(String name) – Increase the player score with “name” by 1. If no player with name is present then add a player with score 1. getEntryFromRank(int rank) – Get the players with the given … Read more Design data structure for players and ranks