In mathematics, the Fibonacci numbers or Fibonacci sequence are the numbers in the following integer sequence:or (often, in modern usage):By definition, the first two numbers in the Fibonacci sequence are either 1 and 1, or 0 and 1, depending on the ...

O(n log n) typical,In computer science, merge sort (also commonly spelled mergesort) is an efficient, general-purpose, comparison-based sorting algorithm. Most implementations produce a stable sort, which means that the implementation preserves the ...