381. Insert Delete GetRandom O(1) - Duplicates allowed

2021-08-24

Problem description:

Implement the RandomizedCollection class:

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1636. Sort Array by Increasing Frequency

2021-08-18

Problem description:

Given an array of integers nums, sort the array in increasing order based on the frequency of the values. If multiple values have the same frequency, sort them in decreasing order.

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974. Subarray Sums Divisible by K

2021-08-17

Problem description:

Given an integer array nums and an integer k, return the number of non-empty subarrays that have a sum divisible by k.

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938. Range Sum of BST

2021-08-12

Problem description:

Given the root node of a binary search tree and two integers low and high, return the sum of values of all nodes with a value in the inclusive range [low, high].

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498. Diagonal Traverse

2021-08-04

Problem description:

Given an m x n matrix mat, return an array of all the elements of the array in a diagonal order.

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1235. Maximum Profit in Job Scheduling

2021-08-01

Problem description:

We have n jobs, where every job is scheduled to be done from startTime[i] to endTime[i], obtaining a profit of profit[i].

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1229. Meeting Scheduler

2021-08-01

Problem description:

Given the availability time slots arrays slots1 and slots2 of two people and a meeting duration duration, return the earliest time slot that works for both of them and is of duration duration.

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759. Employee Free Time

2021-08-01

Problem description:

We are given a list schedule of employees, which represents the working time for each employee.

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1359. Count All Valid Pickup and Delivery Options

2021-08-01

Problem description:

Given n orders, each order consist in pickup and delivery services.

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323. Number of Connected Components in an Undirected Graph

2021-08-01

Problem description:

You have a graph of n nodes. You are given an integer n and an array edges where edges[i] = [ai, bi] indicates that there is an edge between ai and bi in the graph.

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