Merge-Sort-Project

[16,21,11,8,12,22] // initial state

[16,21,11] && [8,12,22]

[16,21] [11] && [8,12] [22]

[16] [21] [11] && [8] [12] [22]

[16,21] [11] && [8,12] [22]

[11,16,21] && [8,12,22]

[8,11,12,16,21,22]

O(nlogn)