We are given a list schedule
of employees, which represents the working time for each employee.
Each employee has a list of non-overlapping Intervals
, and these intervals are in sorted order.
Return the list of finite intervals representing common, positive-length free time for all employees, also in sorted order.
(Even though we are representing Intervals
in the form [x, y]
, the objects inside are Intervals
, not lists or arrays. For example, schedule[0][0].start = 1
, schedule[0][0].end = 2
, and schedule[0][0][0]
is not defined). Also, we wouldn't include intervals like [5, 5] in our answer, as they have zero length.
Example 1:
Input: schedule = [[[1,2],[5,6]],[[1,3]],[[4,10]]] Output: [[3,4]] Explanation: There are a total of three employees, and all common free time intervals would be [-inf, 1], [3, 4], [10, inf]. We discard any intervals that contain inf as they aren't finite.
Example 2:
Input: schedule = [[[1,3],[6,7]],[[2,4]],[[2,5],[9,12]]] Output: [[5,6],[7,9]]
1 class Solution { 2 public List<Interval> employeeFreeTime(List<List<Interval>> avails) { 3 List<Interval> result = new ArrayList<>(); 4 List<Interval> timeLine = new ArrayList<>(); 5 avails.forEach(e -> timeLine.addAll(e)); 6 Collections.sort(timeLine, ((a, b) -> a.start - b.start)); 7 8 Interval temp = timeLine.get(0); 9 for(Interval each : timeLine) { 10 if(temp.end < each.start) { 11 result.add(new Interval(temp.end, each.start)); 12 temp = each; 13 }else{ 14 temp = temp.end < each.end ? each : temp; 15 } 16 } 17 return result; 18 } 19 }