Selection Sort

Given an array of integers, sort the elements in the array in ascending order. The selection sort algorithm should be used to solve this problem.

Examples

• {1} is sorted to {1}
• {1, 2, 3} is sorted to {1, 2, 3}
• {3, 2, 1} is sorted to {1, 2, 3}
• {4, 2, -3, 6, 1} is sorted to {-3, 1, 2, 4, 6}

Corner Cases

• What if the given array is null? In this case, we do not need to do anything.
• What if the given array is of length zero? In this case, we do not need to do anything.

Time: O(N^2)

Space: O(N)

class Solution(object):
  def solve(self, array):
    """
    input: int[] array
    return: int[]
    """
    # write your solution here
    if array is None or len(array) <= 1:
      return array
    for i in range(len(array) - 1):
      min_index = i
      for j in range(i + 1, len(array)):
        if array[j] < array[min_index]:
          min_index = j
      array[i], array[min_index] = array[min_index], array[i]
    return array