A subsequence of an array can be obtained by erasing some (possibly zero) elements from the array. Our platform offers a range of essential problems for practice, as well as the latest questions being asked by top-tier companies. Also return the answer sorted in non-increasing order. The second meeting starts in room 1. Return the minimum number of operations to make an array that is sorted in non-decreasing order. 6. 3 elements arranged at positions 1, 7 and 12, resulting in a minimum distance of 5 (between 7 and 12) A Naive Solution is to consider all subsets of size 3 and find the minimum distance for every subset. Example 1: Nov 2, 2023 · As one of the more classic problems in algorithmic circles, the LIS problem — LeetCode #300 — challenges us to look beyond the immediate array elements and find the longest ascending path Given two strings word1 and word2, return the minimum number of steps required to make word1 and word2 the same. This maximum sum will give us the minimum number of platforms required. 24–Oct 12, 2023 among a random sample of U. And: trip 1: [1, 8] trip 2: [2, 7] trip 3: [1, 3, 4] Welcome to Stack Overflow. Java Apr 3, 2024 · Iterate over the input arrays and increment the value at the arrival time in v and decrement the value at the departure time+1 in v. Minimum Amount of Time to Collect Garbage - Level up your coding skills and quickly land a job. Given the array edges where edges[i] = [fromi, toi, weighti] represents a bidirectional and weighted edge between cities fromi and toi, and given the integer distanceThreshold. Among all possible rooted trees, those with minimum height (i. No matter if you are a beginner or a master, there are always new topics waiting for you to explore. Only one garbage truck may be used at any given moment. Can you solve this real interview question? 01 Matrix - Given an m x n binary matrix mat, return the distance of the nearest 0 for each cell. The cities are given in a circular order. Three garbage trucks are available, each responsible for collecting one type of garbage. Example 1: Input: nums = [3,9,7,3] Output: 2. You may start and stop at any node, you may revisit nodes multiple times, and you may reuse edges. Can you solve this real interview question? Gas Station - There are n gas stations along a circular route, where the amount of gas at the ith station is gas[i]. The length of a path between two nodes is represented by the number of edges between them. Menu. Minimum Total Distance Traveled - There are some robots and factories on the X-axis. Return the array arr. int top() gets the top element of the stack. You are given an integer array robot where robot[i] is the position of the ith robot. Can you solve this real interview question? Minimum Cost to Make at Least One Valid Path in a Grid - Given an m x n grid. However, there could be obstacles along the way. Please read the help pages, take the SO tour, read How to Ask, as well as this question checklist. "213" 4. Return the minimum possible absolute difference. Return the minimum number of trips needed to ship all packages. Example 1: Input: nums = [2,3,1,1,4] Output: 2 Explanation: The minimum number of jumps to reach the last index is 2. The customer id 4 has a first order with delivery id 7 and it is Aug 5, 2021 · Given two arrays, box[] and truck[], where box[i] represents the weight of the i th box and truck[i] represents the maximum load that the i th truck can carry. Python. * For example, if fi = 3 and ri = 2, then the tire would finish its 1st lap in 3 seconds, its 2nd lap in 3 * 2 = 6 seconds, its 3rd lap in 3 * 22 = 12 . The player cannot walk through the box. Explanation: To complete all the tasks, a possible plan is: - In the first round, you complete 3 tasks of difficulty level 2. Minimum Weighted Subgraph With the Required Paths - Level up your coding skills and quickly land a job. The working time of a worker is the sum of the time it takes to complete all jobs assigned to them. Note that if the car reaches a gas station with 0 fuel left, the car can still refuel there. The array must maintain its property that abs (nums [i]) <= limit. Aug 5, 2021 · In this Leetcode Edit Distance problem solution we have Given two strings word1 and word2, return the minimum number of operations required to convert word1 to word2. For example, the letter 'A' is located at coordinate (0, 0), the letter 'B' is located at coordinate (0, 1), the letter 'P' is located at coordinate (2, 3) and the letter 'Z' is located at coordinate (4, 1). We need to find minimum distance to travel to reach such a point which covers all the intervals at once. Example 1: Input: root = [4,2,6,1,3] Output: 1 You need to partition nums into two arrays of length n to minimize the absolute difference of the sums of the arrays. length, where arr [i] is the sum of |i - j| over all j such that nums [j] == nums [i] and j != i. Given the head of a singly linked list, return the middle node of the linked list. Your goal is to devise an optimal assignment such that the maximum working time of any worker is minimized. Back to Explore Page. Explanation: The cars starting at 0 (speed 4) and 2 (speed 2) become a fleet, meeting each other at 4. "231" 5. Example 1: Input: root = [4,2,6,1,3] Output: 1 Matrix Cells in Distance Order - Level up your coding skills and quickly land a job. The truck only needs to make a single delivery. So, before moving onto the We set the boundary from the largest package weight to the sum of the packages' weights. Return a list of all MHTs' root labels. Respondent base (n=611) among approximately 837K invites. Example 1: Input: head = [1,2,3,4,5] Output: [3,4,5] Explanation: The middle node of the list is node 3. Example 1: Input: rungs = [1,3,5,10], dist = 2 Output: 2 Explanation: You currently cannot reach the last rung. For example, consider nums = [5,6,7]. Example 3: Input: head = [1,3,2,2,3,2,2,2,7] Output: [3,3] Explanation: There are two critical points: - [1, 3 ,2,2,3,2,2,2,7]: The second node is a local maxima because 3 Jul 9, 2021 · For each i such that nums[i] == target, calculate Math. Example 1: Input: stones = [0,1,3,5,6,8,12,17] Output: true Explanation: The frog can jump to the last stone by jumping 1 unit to the 2nd stone, then 2 units to the 3rd stone, then 2 units to the 4th stone, then 3 units to the 6th stone, 4 units to the 7th stone, and 5 units to the 8th stone. It's guaranteed that a unique solution Minimum Distance Between BST Nodes - Level up your coding skills and quickly land a job. (i. Note: The answer should be the minimum product before the modulo operation is done. We will send a signal from a given node k. This is a push. - At time 3, only room 2 is not being used. Example 1: Input: root = [1,2,3,4,5] Output: 3. ^ Chegg survey fielded between Sept. If there is no such j, set arr [i] to be 0. Example 1: Input: nums = [1,3,1], k = 1 Output: 0 Explanation: Here The area is abstracted as a grid. Return the minimum number of trips the ship needs to make to deliver all boxes to their respective ports. An interleaving of two strings s and t is a configuration where s and t are divided into n and m substrings respectively, such that: * s = s1 + s2 + + sn * t = t1 + t2 + + tm * |n - m| <= 1 * The interleaving is s1 + t1 + s2 + t2 The array nums has an interesting property that abs (nums [i]) <= limit. It is guaranteed that target exists in nums. The score of a path between two cities is defined as the minimum distance of a road in this path. You have the following three operations permitted on a word: Insert a character. This helper function helps us to count how many days are needed to ship packages with specific capacity (middle value). Example 1: Input: p = 1 Output: 1 Explanation: nums = [1]. - In the second round, you complete 2 tasks Oct 10, 2022 · 5. Find the minimum non-zero product of nums after performing the above operation any number of times. - At time 2, rooms 1 and 2 are not being used. Given the root of a Binary Search Tree (BST), return the minimum difference between the values of any two different nodes in the tree. Jun 14, 2021 · numberOfUnitsPerBox i is the number of units in each box of the type i. Count All Valid Pickup and Delivery Options - Level up your coding skills and quickly land a job. , (n - 1, n - 1)) such that: * All the visited cells of the path are 0. Given an integer n and an integer array ranges of length n + 1 where ranges [i] (0-indexed) means the i-th tap can water the area [i - ranges [i], i + ranges [i]] if it was open. To partition nums, put each element of nums into one of the two arrays. Note that the solution with the given constraints is guaranteed to be unique. By listing and labeling all of the permutations in order, we get the following sequence for n = 3: 1. Note that abs (x) equals x if x >= 0, and -x otherwise. Iterate over the vector v and keep track of the maximum sum seen so far. Example 2: Mar 18, 2021 · For example: int K = 9. Note that abs(x) is the absolute value of x. Minimum Time to Finish the Race - You are given a 0-indexed 2D integer array tires where tires[i] = [fi, ri] indicates that the ith tire can finish its xth successive lap in fi * ri(x-1) seconds. The third meeting starts in room 2. Minimum Weighted Subgraph With the Required Paths - LeetCode There are n + 1 taps located at points [0, 1, , n] in the garden. "312" 6. 1. Example 1: Input: nums = [4,3,10,9,8] Output: [10,9] Explanation: The subsequences [10,9] and [10,8] are minimal The diameter of a binary tree is the length of the longest path between any two nodes in a tree. Oct 29, 2022 · Given many intervals as ranges and our position. There is only one element, so the product equals that element Minimum Cost Tree From Leaf Values - Given an array arr of positive integers, consider all binary trees such that: * Each node has either 0 or 2 children; * The values of arr correspond to the values of each leaf in an in-order traversal of the tree. Return the minimum amount of money required before any transaction so that all of the transactions can be completed regardless of the order of the transactions. Example 1: Output: 11. Can you solve this real interview question? Interleaving String - Given strings s1, s2, and s3, find whether s3 is formed by an interleaving of s1 and s2. Write an algorithm to determine the minimum distance required for the truck to deliver the order. Return an array answer of length n where answer[i] is the sum of the distances between the Minimum Weighted Subgraph With the Required Paths - You are given an integer n denoting the number of nodes of a weighted directed graph. "321" Given n and k, return the kth permutation sequence. If it cannot reach the destination, return -1. Example 1: Input: boxes = [ [1,1], [2,1], [1,1]], portsCount = 2, maxBoxes = 3, maxWeight = 3 Output: 4 Explanation: The optimal strategy is as follows: - The ship takes Level up your coding skills and quickly land a job. Return the coordinates of all cells in the matrix, sorted by their distance from (rCenter, cCenter) from the smallest distance to the largest distance. The distance between two adjacent cells is 1. Example 2: The frog can only jump in the forward direction. Mar 9, 2023 · Approach: It is needed to find the minimum number of items per delivery. There exists an array arr of length nums. Example 1: Can you solve this real interview question? Find K-th Smallest Pair Distance - The distance of a pair of integers a and b is defined as the absolute difference between a and b. Example 1: Input: nums = [1,3,1,1,2] Output: [5,0,3,4,0] Explanation: When i Given the root of a Binary Search Tree (BST), return the minimum absolute difference between the values of any two different nodes in the tree. The Solution Approach Level up your coding skills and quickly land a job. Return the minimum number of refueling stops the car must make in order to reach its destination. Now, given that all the boxes are kept at the source, the task is to find the Return the minimum number of jumps to reach nums[n - 1]. Since the answer may be too large, return it modulo 10^9 + 7. void push(int val) pushes the element val onto the stack. Java. Return the minimum number of elements you need to add to make the sum of the array equal to goal. The first such value with tours less than or equal to K gives the required number. In each round, we try the middle value (ship capacity) m = l + ( (r - l) / 2) m = l+( (r −l)/2) with the function count_days countdays. If there is no way to reach the target, return -1. Return the minimum number of pushes to move the box to the target. This is the best place to expand your knowledge and get prepared for your next interview. Example 1: Input: nums = [3,9,3] Maximum Units on a Truck - Level up your coding skills and quickly land a job. You must implement a solution with O(1) time complexity for Maximum Units on a Truck - Level up your coding skills and quickly land a job. Each cell of the grid has a sign pointing to the next cell you should visit if you are currently in this cell. We can reach position 4 by travelling. Since there is no metal garbage, we do not need to consider the metal garbage truck. Not all locations are accessible by road. A clear path in a binary matrix is a path from the top-left cell (i. Explanation: The route of [1,3,5,3,5] has a maximum absolute difference of 2 in Sep 19, 2023 · Explanation: Largest minimum distance = 5. You are also given a 2D integer array factory where factory[j] = [positionj, limitj] indicates that positionj is the position of the jth factory and that the jth factory can You have a keyboard layout as shown above in the X-Y plane, where each English uppercase letter is located at some coordinate. Collects the glass garbage at house 3. Given arrival and departure times of all trains that reach a railway station. If there is no clear path, return -1. Minimum Distance Between BST Nodes - LeetCode. So, the last city is followed by the first city. Return the minimum possible maximum working time of any assignment. The problem Distance Between Bus Stops Leetcode Solution provides us an array of integers describing the distance between the adjacent cities. Sum of Distances - You are given a 0-indexed integer array nums. Explanation: One possible path is [1,0,2,0,3] Example 2: Feb 5, 2023 · SELECT Round(( Sum(CASE WHEN order_date = customer_pref_delivery_date THEN 1 ELSE 0 END) / Count(1) ) * 100, 2) AS immediate_percentage FROM delivery Leetcode Sql 743. While one truck is driving or picking up garbage, the other two trucks cannot do anything. You are also given times, a list of travel times as directed edges times[i] = (u i, v i, w i), where u i is the source node, v i is the target node, and w i is the time it takes for a signal to travel from source to target. Explanation: 3 is the length of the path [4,2,1,3] or [5,2,1,3]. You have a car with an unlimited gas tank and it costs cost[i] of gas to travel from the ith station to its next (i + 1)th station. abs(i - start) and maintain the minimum distance. The height of a rooted tree is the number of edges on the longest downward path between the root and a leaf. Return the maximum sum. Replace a character. The cities graph is not necessarily connected. Return the minimum effort required to travel from the top-left cell to the bottom-right cell. min(h)) are called minimum height trees (MHTs). Find the minimum number of platforms required for the railway station so that no train is kept waiting. Example 2: Can you solve this real interview question? Find the City With the Smallest Number of Neighbors at a Threshold Distance - There are n cities numbered from 0 to n-1. . Find the smallest set of vertices from which all nodes in the graph are reachable. You are given the integer n and the array edges where edges[i] = [ai, bi] indicates that there is an edge between nodes ai and bi in the tree. maxDistance = 6 - 3 = 3. This path may or may not pass through the root. HTML. Level up your coding skills and quickly land a job. You are also given an integer truckSize, which is the maximum number of boxes that can be put on the truck. Return the minimum number of taps that should be open to water the whole garden, If the garden Can you solve this real interview question? Permutation Sequence - The set [1, 2, 3, , n] contains a total of n! unique permutations. If there are two middle nodes, return the second middle node. You can return the answer in any order. Get four FREE subscriptions included with Chegg Study or Chegg Study Pack, and keep your school days running smoothly. You have the following three operations permitted on a word: * Insert a character * Delete a character * Replace a character Example 1: Input: word1 = "horse", word2 = "ros" Output: 3 Explanation: horse -> rorse (replace 'h Boost your coding interview skills and confidence by practicing real interview questions with LeetCode. customers who used Chegg Study or Chegg Study Pack in Q2 2023 and Q3 2023. Altogether, it takes 13 minutes to pick up all the glass garbage. The maximum distance is between the third and the sixth node. Example 1: Input: tasks = [2,2,3,3,2,4,4,4,4,4] Output: 4. Return the minimum number of minutes needed to pick up all the garbage. Matrix Cells in Distance Order - You are given four integers row, cols, rCenter, and cCenter. Finally, return the minimum distance. An Efficient Solution is based on Binary Search. length. The sign of grid[i][j] can be: * 1 which means go to the cell to the right. Assumptions: Some places in the delivery area cannot be accessed by the driver, as there are no roads in those locations. Dec 25, 2020 · The query result format is in the following example: The customer id 1 has a first order with delivery id 1 and it is scheduled. So, the idea is to iterate from 1 to the maximum value of items in a bucket and calculate the number of tours required for each bucket and find the total number of tours for complete delivery. LeetCode Solutions in C++20, Java, Python, MySQL, and TypeScript. Given an integer array nums and an integer k, return the kth smallest distance among all the pairs nums[i] and nums[j] where 0 <= i < j < nums. In one operation, we can replace nums[1] with 2 and 4 and convert nums to [5,2,4,7]. Can you solve this real interview question? Combinations - Given two integers n and k, return all possible combinations of k numbers chosen from the range [1, n]. Example 1: Input: root = [4,2,6,1,3] Output: 1 You are also given a 2D array roads where roads[i] = [a i, b i, distance i] indicates that there is a bidirectional road between cities a i and b i with a distance equal to distance i. Return the minimum number of rungs that must be added to the ladder in order for you to climb to the last rung. Given two integer arrays gas and Return the minimum rounds required to complete all the tasks, or -1 if it is not possible to complete all the tasks. Return the length of the shortest path that visits every node. Feb 13, 2021 · numberOfUnitsPerBox_i is the number of units in each box of the type i. Can you solve this real interview question? Edit Distance - Given two strings word1 and word2, return the minimum number of operations required to convert word1 to word2. You are given a network of n nodes, labeled from 1 to n. You are also given a 2D integer array edges where edges [i] = [fromi, toi, weighti] denotes that there exists a directed edge from fromi to toi with weight weighti. Example 1: Input: heights = [[1,2,2],[3,8,2],[5,3,5]] Output: 2. If the car reaches the destination with 0 fuel left, it is still considered to have arrived. You are given an array obstacles of length n + 1 where each obstacles[i] (ranging from 0 to 3) describes an obstacle on The minimum distance is between the fifth and the sixth node. Now each truck takes 1 hour to transport a box from source to destination and another one hour to come back. Example 1: Input: nums = [1,2,3,4,5], target The ship must end at storage after all the boxes have been delivered. Therefore, it takes a total of 8 + 13 = 21 minutes to collect all the garbage. The customer id 2 has a first order with delivery id 2 and it is immediate. Example 1: Output: 4. Example 1: Input: word1 = "sea", word2 = "eat" Output: 2 Explanation: You need one step to make "sea" to "ea" and another step to make "eat" to "ea". The nodes are numbered from 0 to n - 1. Output : 1. In one step, you can delete exactly one character in either string. The test cases are generated such that you can reach nums[n - 1]. Implement the MinStack class: MinStack() initializes the stack object. Now, we are required to find out the minimum distance between the two given cities. "123" 2. You can move according to these rules: * In 1 second, you can either: * move vertically by one unit, * move horizontally by one unit, or Each garbage truck starts at house 0 and must visit each house in order; however, they do not need to visit every house. Consider that all the trains arrive on the same day and leave on the. There is a rows x cols matrix and you are on the cell with the coordinates (rCenter, cCenter). minDistance = 6 - 5 = 1. int getMin() retrieves the minimum element in the stack. For the given example, the result should be: 3 trips. , (0, 0)) to the bottom-right cell (i. The first meeting starts in room 0. The fleet moves at speed 1 until it reaches target. Nov 6, 2023 · LeetCode Problem 1071 Greatest Common Divisor of Strings — LeetCode 75 Solving LeetCode 75 study plan problems in multiple languages 5 min read · Sep 24, 2023 Maximum Units on a Truck - Level up your coding skills and quickly land a job. S. Examples: Input : Intervals = [(0, 7), (2, 14), (4, 6)] Position = 3. Then, the fleet at 4 (speed 2) and the car at position 5 (speed 1) become one fleet, meeting each other at 6. - At time 4, all three rooms are being used. A route's effort is the maximum absolute difference in heights between two consecutive cells of the route. Given maxTime, edges, and passingFees, return the minimum cost to complete your journey, or -1 if you cannot complete it within maxTime minutes. The task is to determine the minimum number of minutes required to pick up all the garbage. Can you solve this real interview question? Minimum Distance Between BST Nodes - Level up your coding skills and quickly land a job. Return abs(i - start). A frog starts at point 0 in the second lane and wants to jump to point n. You are given an array graph where graph[i] is a list of all the nodes connected with node i by an edge. Can you solve this real interview question? Minimum Distance to the Target Element - Given an integer array nums (0-indexed) and two integers target and start, find an index i such that nums[i] == target and abs(i - start) is minimized. These trucks start at house 0 and must visit each house in order, but they don’t necessarily have to stop at every house. The ladder will now have rungs at [1,3,5,7,8,10]. Finally, return the largest of all minimum distances. e go from grid[i][j] to grid[i][j + 1]) * 2 which means go to the cell to the left Explanation: - At time 1, all three rooms are not being used. Return the city with the smallest number of cities After performing a transaction, money becomes money - costi + cashbacki. e. You begin the journey with an empty tank at one of the gas stations. Count All Valid Pickup and Delivery Options - LeetCode Can you solve this real interview question? Sum of Distances in Tree - There is an undirected connected tree with n nodes labeled from 0 to n - 1 and n - 1 edges. Minimum Time Visiting All Points - On a 2D plane, there are n points with integer coordinates points [i] = [xi, yi]. Count All Valid Pickup and Delivery Options - Given n orders, each order consists of a pickup and a delivery service. Explanation: The path to take is 0 -> 1 -> 2 -> 5, which takes 30 minutes and has $11 worth of passing fees. You have a keyboard layout as shown above in the X-Y plane, where each English uppercase letter is located at some coordinate. Network Delay Time. Can you solve this real interview question? Minimum Sideway Jumps - There is a 3 lane road of length n that consists of n + 1 points labeled from 0 to n. Example 1: Input: transactions = [ [2,1], [5,0], [4,2]] Output: 10 Explanation: Starting with money = 10, the Can you solve this real interview question? All Nodes Distance K in Binary Tree - Given the root of a binary tree, the value of a target node target, and an integer k, return an array of the values of all nodes that have a distance k from the target node. Add rungs at heights 7 and 8 to climb this ladder. In one operation you can replace any element of the array with any two elements that sum to it. void pop() removes the element on the top of the stack. There are n cities numbered from 0 to n - 1 and n - 1 roads such that there is only one way to travel between two different cities (this network form a tree). LeetCode Explore is the best place for everyone to start practicing and learning on LeetCode. Interview Preparation. Example 1: The box can be moved to an adjacent free cell by standing next to the box and then moving in the direction of the box. The customer id 3 has a first order with delivery id 5 and it is scheduled. Travels from house 2 to house 3. Delete a character. Example 1: Input: nums = [1,-1,1], limit = 3, goal Minimum Distance Between BST Nodes - LeetCode. distance 1, at which all intervals will. Can you solve this real interview question? Minimum Number of Vertices to Reach All Nodes - Given a directed acyclic graph, with n vertices numbered from 0 to n-1, and an array edges where edges[i] = [fromi, toi] represents a directed edge from node fromi to node toi. * The value of each non-leaf node is equal to the product of the largest leaf value in its left Can you solve this real interview question? Check Knight Tour Configuration - Level up your coding skills and quickly land a job. Example 2: Output: 48. The car starting at 4 (speed 1) travels to 5. You can choose any boxes to put on the truck as long as the number of boxes does not exceed truckSize. Count all valid pickup/delivery possible sequences such that delivery (i) is always after of pickup (i). Return the minimum time in seconds to visit all the points in the order given by points. Minimum Amount of Time to Collect Garbage - LeetCode Each job should be assigned to exactly one worker. Shortest Path in Binary Matrix - Given an n x n binary matrix grid, return the length of the shortest clear path in the matrix. Return this product modulo 10 9 + 7. "132" 3. Jump 1 step from index 0 to 1, then 3 steps to the last index. Data Structure. Last year, The ministry of transport decided to orient the roads in one direction because they are too narrow. lp oq mi me kb by df qh ly nc