{
  "task_id": "task2_medium",
  "description": "Schedule a 60-minute planning session with 4 attendees",
  "difficulty": "medium",
  "meeting_request": {
    "duration": 60,
    "priority": 2,
    "attendees": ["user1", "user2", "user3", "user4"],
    "summary": "Cross-Team Planning"
  },
  "calendars": {
    "user1": [
      ["2025-04-07T09:00:00+00:00", "2025-04-07T10:00:00+00:00", 2, "Standup"],
      ["2025-04-07T10:30:00+00:00", "2025-04-07T11:30:00+00:00", 3, "Review"],
      ["2025-04-07T13:00:00+00:00", "2025-04-07T14:00:00+00:00", 3, "Lunch meeting"],
      ["2025-04-07T15:00:00+00:00", "2025-04-07T16:00:00+00:00", 4, "Optional workshop"],
      ["2025-04-07T16:30:00+00:00", "2025-04-07T17:00:00+00:00", 3, "Sync"]
    ],
    "user2": [
      ["2025-04-07T09:00:00+00:00", "2025-04-07T10:00:00+00:00", 2, "Standup"],
      ["2025-04-07T11:00:00+00:00", "2025-04-07T12:00:00+00:00", 2, "Client demo"],
      ["2025-04-07T14:00:00+00:00", "2025-04-07T15:00:00+00:00", 3, "Code review"],
      ["2025-04-07T16:00:00+00:00", "2025-04-07T17:00:00+00:00", 3, "Office hours"]
    ],
    "user3": [
      ["2025-04-07T09:30:00+00:00", "2025-04-07T10:30:00+00:00", 3, "Design review"],
      ["2025-04-07T12:00:00+00:00", "2025-04-07T13:00:00+00:00", 3, "Team lunch"],
      ["2025-04-07T14:00:00+00:00", "2025-04-07T15:30:00+00:00", 2, "Sprint planning"],
      ["2025-04-07T16:00:00+00:00", "2025-04-07T16:30:00+00:00", 4, "Coffee chat"]
    ],
    "user4": [
      ["2025-04-07T10:00:00+00:00", "2025-04-07T11:00:00+00:00", 2, "Strategy meeting"],
      ["2025-04-07T13:00:00+00:00", "2025-04-07T14:00:00+00:00", 3, "1-on-1"],
      ["2025-04-07T15:00:00+00:00", "2025-04-07T16:00:00+00:00", 3, "Team sync"]
    ]
  },
  "preferences": {
    "user1": {
      "preferred_hours": {"start": 10, "end": 16},
      "max_meetings_per_day": 5,
      "avoid_back_to_back": true,
      "buffer_minutes": 15
    },
    "user2": {
      "preferred_hours": {"start": 9, "end": 17},
      "max_meetings_per_day": 4,
      "avoid_back_to_back": true,
      "buffer_minutes": 10
    },
    "user3": {
      "preferred_hours": {"start": 9, "end": 15},
      "max_meetings_per_day": 5,
      "avoid_back_to_back": false,
      "buffer_minutes": 0
    },
    "user4": {
      "preferred_hours": {"start": 10, "end": 17},
      "max_meetings_per_day": 6,
      "avoid_back_to_back": true,
      "buffer_minutes": 15
    }
  },
  "expected_solution": {
    "optimal_slot": "2025-04-07T11:00:00+00:00",
    "expected_score_range": [0.5, 0.7],
    "min_steps": 3,
    "requires_rescheduling": true,
    "reschedulable_meetings": ["user3:Coffee chat (priority 4)"]
  }
}