testcases:
  - name: "testcase 1"
    inputs:
    - 1 : [100, 50, 200, 25, 75, 125, 350]
    output:
    - 1 : [100, 200, 50, 350, 125, 75, 25]

  - name: "testcase 2"
    inputs:
    - 1 : [1, 2, null, 3, null, 4]
    output:
    - 1 : [1, null, 2, null, 3, null, 4]

  - name: "testcase 3"
    inputs:
    - 1 : [25, 50, 75, 100, 125, 350]
    output:
    - 1 : [25, 75, 50, null, 350, 125, 100]

  - name: "testcase 4"
    inputs:
    - 1 : [100]
    output:
    - 1 : [100]
  - name: "testcase 5"
    inputs:
    - 1 : []
    output:
    - 1 : []