testcases:
  - name: "testcase 1"
    inputs:
    - 1 : [6,2,8,0,4,7,9,null,null,3,5]
    output:
    - 1 : True
  - name: "testcase 2"
    inputs:
    - 1 : [2,1]
    output:
    - 1 : True
  - name: "testcase 3"
    inputs:
    - 1 : [2,1,3]
    output:
    - 1 : True
  - name: "testcase 4"
    inputs:
    - 1 : [20,8,22,4,12,null,null,null,null,10,14]
    output:
    - 1 : False
  - name: "testcase 5"
    inputs:
    - 1 : [10,8,null,1]
    output:
    - 1 : False