billyct / coding-test-20210128

A Coding test

// input:
[
    [1, 3, 10]
    [1, 2, 10, 21, 100]
    [4, 7]
    [12, 15, 18, 30]
    [35]
]

// output
[1, 1, 2, 3, 4, 7, 10, 10, 12, 15, 18, 21, 30, 35, 100]