Given an integer array hours representing times in hours, return an integer denoting the number of pairs i, j where i < j and hours[i] + hours[j] forms a complete day.A complete day is defined as a time duration that is an exact multiple of 24 hours.For example, 1 day is 24 hours, 2 days is 48 hours, 3 days is 72 hours, and so on. Example 1:Input: hours = [12,12,30,24,24]Output: 2Explanation:The pairs of indices that form a complete day are (0, 1) and (3, 4).Example 2:Input: hours = [72,48,24,3]Output: 3Explanation:The pairs of indices that form a complete day are (0, 1), (0, 2), and (1, 2). Constraints:1 <= hours.length <= 1001 <= hours[i] <= 109

You are given a positive integer days representing the total number of days an employee is available for work (starting from day 1). You are also given a 2D array meetings of size n where, meetings[i] = [start_i, end_i] represents the starting and ending days of meeting i (inclusive).Return the count of days when the employee is available for work but no meetings are scheduled.Note: The meetings may overlap. Example 1:Input: days = 10, meetings = [[5,7],[1,3],[9,10]]Output: 2Explanation:There is no meeting scheduled on the 4th and 8th days.Example 2:Input: days = 5, meetings = [[2,4],[1,3]]Output: 1Explanation:There is no meeting scheduled on the 5th day.Example 3:Input: days = 6, meetings = [[1,6]]Output: 0Explanation:Meetings are scheduled for all working days.

Given an array arr of 4 digits, find the latest 24-hour time that can be made using each digit exactly once.24-hour times are formatted as "HH:MM", where HH is between 00 and 23, and MM is between 00 and 59. The earliest 24-hour time is 00:00, and the latest is 23:59.Return the latest 24-hour time in "HH:MM" format. If no valid time can be made, return an empty string.

Here on earth, our 24-hour day is composed of two parts, each of 12 hours. Each hour in each part has a corresponding hour in the other part separated by 12 hours: the hour essentially measures the duration since the start of the daypart. For example, 1 hour in the first part of the day is equivalent to 13, which is 1 hour into the second part of the day.Now, consider the equivalent hours that are both prime numbers. We have 3 such instances for a 24-hour 2-part day:5~177~1911~23Accept two natural numbers D, P >1 corresponding respectively to a number of hours per day and the number of parts in a day separated by a space. D should be divisible by P, meaning that the number of hours per part (D/P) should be a natural number. Calculate the number of instances of equivalent prime hours. Output zero if there is no such instance. Note that we require each equivalent hour in each part in a day to be a prime number.Constraints:InputThe single line consists of two space-separated integers, D and P corresponding to the number of. hours per day and number of parts in a day respectivelyOutputOutput must be a single number, corresponding to the number of instances of equivalent prime number, as described aboveConstraints10 <= D < 5002 <= P < 50Example:Example 1:Input: 24 2Output: 3 Example 2:Input36 3Output2Explanation:In the given second example D = 36 and P = 3Duration of each day part = 122~14~X3~15~X5~17~29 – instance of equivalent prime hours7~19~31 – instance of equivalent prime hours11~23~XHence the answers is 2.

Convert hours to the number of days to the thousandth place. 48.5 hours = days.

Given an array of integers temperatures represents the daily temperatures, return an array answer such that answer[i] is the number of days you have to wait after the ith day to get a warmer temperature. If there is no future day for which this is possible, keep answer[i] == 0 instead. Example 1:Input: temperatures = [73,74,75,71,69,72,76,73]Output: [1,1,4,2,1,1,0,0]