challenge-127/iangoodnight/test_cases/ch2/case1.json


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{
  "input": [
    [
      1,
      4
    ],
    [
      3,
      5
    ],
    [
      6,
      8
    ],
    [
      12,
      13
    ],
    [
      3,
      20
    ]
  ],
  "output": [
    [
      3,
      5
    ],
    [
      3,
      20
    ]
  ]
}