testcases:
  - name: "testcase 1"
    inputs:
    - 1 : [1, 2, 3, 4, 5, 6]
    output: 
    - 1 : 4
  - name: "testcase 2"
    inputs:
    - 1 : [12,7,1,9,10,15]
    output: 
    - 1 : 4
  - name: "testcase 3"
    inputs:
    - 1 : [3, 9, 20, 15, 7]
    output: 
    - 1 : 3
  - name: "testcase 4"
    inputs:
    - 1 : [1, 2]
    output: 
    - 1 : 1
  - name: "testcase 5"
    inputs:
    - 1 : [3, 4, 5, 6, 7, 8]
    output: 
    - 1 : 4
  - name: "testcase 6"
    inputs:
    - 1 : [1, null, 3, 4, 5, 6, null, null, 7]
    output: 
    - 1 : 4