You are given an integer n. There are n rooms numbered from 0 to n - 1.
You are given a 2D integer array meetings where meetings[i] = [starti, endi] means that a meeting will be held during the half-closed time interval [starti, endi). All the values of starti are unique.
Meetings are allocated to rooms in the following manner:
- Each meeting will take place in the unused room with the lowest number.
- If there are no available rooms, the meeting will be delayed until a room becomes free. The delayed meeting should have the same duration as the original meeting.
- When a room becomes unused, meetings that have an earlier original start time should be given the room.
Return the number of the room that held the most meetings. If there are multiple rooms, return the room with the lowest number.
A half-closed interval [a, b) is the interval between a and b including a and not including b.
You are given an array nums consisting of positive integers.
We call a subarray of nums nice if the bitwise AND of every pair of elements that are in different positions in the subarray is equal to 0.
Return the length of the longest nice subarray.
A subarray is a contiguous part of an array.
Note that subarrays of length 1 are always considered nice.
2400. Number of Ways to Reach a Position After Exactly k Steps
You are given two positive integers startPos and endPos. Initially, you are standing at position startPos on an infinite number line. With one step, you can move either one position to the left, or one position to the right.
Given a positive integer k, return the number of different ways to reach the position endPos starting from startPos, such that you perform exactly k steps. Since the answer may be very large, return it modulo 109 + 7.
Two ways are considered different if the order of the steps made is not exactly the same.
Note that the number line includes negative integers.
2399. Check Distances Between Same Letters
You are given a 0-indexed string s consisting of only lowercase English letters, where each letter in s appears exactly twice. You are also given a 0-indexed integer array distance of length 26.
Each letter in the alphabet is numbered from 0 to 25 (i.e. ‘a’ -> 0, ‘b’ -> 1, ‘c’ -> 2, … , ‘z’ -> 25).
In a well-spaced string, the number of letters between the two occurrences of the ith letter is distance[i]. If the ith letter does not appear in s, then distance[i] can be ignored.
Return true if s is a well-spaced string, otherwise return false.
2398. Maximum Number of Robots Within Budget
You have n robots. You are given two 0-indexed integer arrays, chargeTimes and runningCosts, both of length n. The ith robot costs chargeTimes[i] units to charge and costs runningCosts[i] units to run. You are also given an integer budget.
The total cost of running k chosen robots is equal to max(chargeTimes) + k * sum(runningCosts), where max(chargeTimes) is the largest charge cost among the k robots and sum(runningCosts) is the sum of running costs among the k robots.
Return the maximum number of consecutive robots you can run such that the total cost does not exceed budget.
2397. Maximum Rows Covered by Columns
You are given a 0-indexed m x n binary matrix mat and an integer cols, which denotes the number of columns you must choose.
A row is covered by a set of columns if each cell in the row that has a value of 1 also lies in one of the columns of the chosen set.
Return the maximum number of rows that can be covered by a set of cols columns.