#171
Intervals
| Difficulty: | Medium |
| Topics: |
Write a function that takes a sequence of integers
and returns a sequence of “intervals”.
Each interval is a a vector of two integers, start and end,
such that all integers between start and end (inclusive)
are contained in the input sequence.
 | (= (__ [1 2 3]) [[1 3]]) |
| (= (__ [10 9 8 1 2 3]) [[1 3] [8 10]]) |
| (= (__ [1 1 1 1 1 1 1]) [[1 1]]) |
| (= (__ []) []) |
| (= (__ [19 4 17 1 3 10 2 13 13 2 16 4 2 15 13 9 6 14 2 11])
[[1 4] [6 6] [9 11] [13 17] [19 19]]) |