{
  "synthetic": true,
  "scope": "Finite offline teaching model, not production implementation.",
  "function": "tiers",
  "cases": [
    {
      "id": 1,
      "args": [
        9999,
        [
          [
            0,
            9999
          ],
          [
            10000,
            null
          ]
        ]
      ],
      "expected": 1
    },
    {
      "id": 2,
      "args": [
        10000,
        [
          [
            0,
            9999
          ],
          [
            10001,
            null
          ]
        ]
      ],
      "expected": 0
    },
    {
      "id": 3,
      "args": [
        50001,
        [
          [
            0,
            9999
          ],
          [
            10000,
            50000
          ]
        ]
      ],
      "expected": 0
    },
    {
      "id": 4,
      "args": [
        10000,
        [
          [
            0,
            10000
          ],
          [
            10000,
            null
          ]
        ]
      ],
      "expected": 2
    }
  ]
}