Enumerate Weekly Work Schedules
Agoda● EasyFULLTIMEPHONE SCREENProblem statement
An employee has to work exactly as many hours as they are told to each week, scheduling no more than a given daily maximum number of hours. On some days, the hours worked will be given. The employee gets to choose the remainder of their schedule, within the given limits.
A completed schedule consists of exactly 7 digits in the range 0 to 8 that represent each day's work hours. A pattern string similar to the schedule is given, but the scheduled hours are marked by a question mark, ?, (ascii 63 decimal). Given a maximum number of hours that can be worked in a day, replace the question marks with digits so the scheduled hours is exactly the total hours that must be worked in a week.
Determine all possible work schedules that meet the requirements and return them as a list of strings, sorted ascending.
Function
findSchedules(work_hours: int, day_hours: int, pattern: String) → String[]
Complete the function findSchedules in the editor.
findSchedules has the following parameter(s):
- 1.
int work_hours: the hours that must be worked in the week - 2.
int day_hours: the maximum hours that may be worked in a day - 3.
String pattern: the partially completed schedule
Returns
String arr[]: represents all possible valid schedules (must be ordered lexicographically ascending)
Examples
Example 1
work_hours = 24day_hours = 4pattern = "08??840"return = ["0804840", "0813840", "0822840", "0831840", "0840840"]There are 2 unknown days and 24 - 20 = 4 hours left to schedule. The five listed schedules use every split of 4 in which each day is between 0 and 4 hours.
Example 2
work_hours = 56day_hours = 8pattern = "???8???"return = ["8888888"]There is only one way to work 56 hours in 7 days when at most 8 hours may be worked each day.
Example 3
work_hours = 3day_hours = 2pattern = "??2??00"return = ["0020100", "0021000", "0120000", "1020000"]The fixed 2 hours leave 1 more hour to schedule, and it can be placed on any one of the four question-mark days.
Constraints
- 1 ≤ work_hours ≤ 56
- 1 ≤ day_hours ≤ 8
- | pattern | = 7
- Each character of pattern ∈ {0, 1, ..., 8}
- There is at least one correct schedule.