【Python】Codility in Python : Lesson 4 - Counting Elements【MissingInteger】

Counting Elements 練習題的第一題題目是【MissingInteger】
Find the minimal positive integer not occurring in a given sequence.

方法一：使用 in set 判斷內容值的簡易方式

def solutionByInSet(A):
  result = 1
  s = set(A)
  while result in s:
    result += 1
  return result

完整練習題 source code 請參閱：github