{
  "schema_version": "1.0",
  "name": "Weekly Assessment 01",
  "description": "Sample plan for the LeetCode Performance Tracker LMS. Import this as a template, or hand its shape to an LLM and ask it to generate the next one from your exported CSVs.",
  "target_distribution": {
    "medium": 8,
    "hard": 2
  },
  "problems": [
    {
      "order": 1,
      "leetcode_number": 3,
      "title": "Longest Substring Without Repeating Characters",
      "url": "https://leetcode.com/problems/longest-substring-without-repeating-characters/",
      "difficulty": "Medium",
      "novelty": "Never Seen",
      "evaluation": {
        "primary_pattern": "Sliding Window",
        "secondary_patterns": ["Hashing"],
        "selection_reason": "Tests variable-size sliding window recognition and shrink-condition reasoning.",
        "expected_failure_modes": [
          "Incorrect shrinking condition",
          "Duplicate handling",
          "Off-by-one boundary"
        ]
      }
    },
    {
      "order": 2,
      "leetcode_number": 42,
      "title": "Trapping Rain Water",
      "url": "https://leetcode.com/problems/trapping-rain-water/",
      "difficulty": "Hard",
      "novelty": "Seen But Never Solved",
      "evaluation": {
        "primary_pattern": "Two Pointers",
        "secondary_patterns": ["Monotonic Stack"],
        "selection_reason": "Tests boundary/contribution reasoning rather than the memorized two-pointer trick alone.",
        "expected_failure_modes": [
          "Duplicate boundary handling",
          "Incorrect contribution count"
        ]
      }
    },
    {
      "order": 3,
      "leetcode_number": 200,
      "title": "Number of Islands",
      "url": "https://leetcode.com/problems/number-of-islands/",
      "difficulty": "Medium",
      "novelty": "Recently Solved",
      "evaluation": {
        "primary_pattern": "DFS",
        "secondary_patterns": ["Graphs"],
        "selection_reason": "Tests grid traversal recognition and visited-state tracking.",
        "expected_failure_modes": [
          "Missing visited tracking",
          "Off-by-one grid bounds"
        ]
      }
    },
    {
      "order": 4,
      "leetcode_number": 55,
      "title": "Jump Game",
      "url": "https://leetcode.com/problems/jump-game/",
      "difficulty": "Medium",
      "novelty": "Solved Long Ago",
      "evaluation": {
        "primary_pattern": "Greedy",
        "secondary_patterns": [],
        "selection_reason": "Tests whether a greedy reachability argument is recognized instead of reaching for DP by default.",
        "expected_failure_modes": [
          "Defaulting to O(n^2) DP",
          "Incorrect reachability update"
        ]
      }
    },
    {
      "order": 5,
      "leetcode_number": 146,
      "title": "LRU Cache",
      "url": "https://leetcode.com/problems/lru-cache/",
      "difficulty": "Medium",
      "novelty": "Unknown",
      "evaluation": {
        "primary_pattern": "Linked List",
        "secondary_patterns": ["Hashing"],
        "selection_reason": "Tests combining a hash map with a doubly linked list for O(1) get/put.",
        "expected_failure_modes": [
          "Incorrect eviction order",
          "Broken pointer updates on move-to-front"
        ]
      }
    },
    {
      "order": 6,
      "leetcode_number": 56,
      "title": "Merge Intervals",
      "url": "https://leetcode.com/problems/merge-intervals/",
      "difficulty": "Medium",
      "novelty": "Never Seen",
      "evaluation": {
        "primary_pattern": "Intervals",
        "secondary_patterns": [],
        "selection_reason": "Tests sort-then-sweep interval merging and the overlap condition.",
        "expected_failure_modes": [
          "Wrong overlap condition (< vs <=)",
          "Forgetting to sort first"
        ]
      }
    },
    {
      "order": 7,
      "leetcode_number": 295,
      "title": "Find Median from Data Stream",
      "url": "https://leetcode.com/problems/find-median-from-data-stream/",
      "difficulty": "Hard",
      "novelty": "Never Seen",
      "evaluation": {
        "primary_pattern": "Heap",
        "secondary_patterns": [],
        "selection_reason": "Tests recognizing the two-heap (max-heap/min-heap) balance pattern for streaming medians.",
        "expected_failure_modes": [
          "Heaps drift out of balance",
          "Wrong heap sign/ordering"
        ]
      }
    },
    {
      "order": 8,
      "leetcode_number": 207,
      "title": "Course Schedule",
      "url": "https://leetcode.com/problems/course-schedule/",
      "difficulty": "Medium",
      "novelty": "Seen But Never Solved",
      "evaluation": {
        "primary_pattern": "Topological Sort",
        "secondary_patterns": ["Graphs", "DFS"],
        "selection_reason": "Tests cycle detection via topological sort rather than naive DFS without a visiting-state.",
        "expected_failure_modes": [
          "Missing 3-color cycle detection",
          "Wrong in-degree bookkeeping"
        ]
      }
    },
    {
      "order": 9,
      "leetcode_number": 300,
      "title": "Longest Increasing Subsequence",
      "url": "https://leetcode.com/problems/longest-increasing-subsequence/",
      "difficulty": "Medium",
      "novelty": "Recently Solved",
      "evaluation": {
        "primary_pattern": "1D DP",
        "secondary_patterns": ["Binary Search"],
        "selection_reason": "Tests recognizing the O(n log n) patience-sorting formulation, not just the O(n^2) DP.",
        "expected_failure_modes": [
          "Settling for O(n^2) under time pressure",
          "Incorrect binary search bound (lower vs upper)"
        ]
      }
    },
    {
      "order": 10,
      "leetcode_number": 75,
      "title": "Sort Colors",
      "url": "https://leetcode.com/problems/sort-colors/",
      "difficulty": "Medium",
      "novelty": "Solved Long Ago",
      "evaluation": {
        "primary_pattern": "Two Pointers",
        "secondary_patterns": [],
        "selection_reason": "Tests the three-way (Dutch national flag) partition rather than a two-pass counting shortcut.",
        "expected_failure_modes": [
          "Off-by-one on the swap pointers",
          "Advancing the wrong pointer after a swap"
        ]
      }
    }
  ]
}