{
  "source": "https://neetcode.io/roadmap",
  "extracted": "2026-06-01",
  "nodes": [
    { "id": "1",  "name": "Arrays & Hashing" },
    { "id": "2",  "name": "Two Pointers" },
    { "id": "3",  "name": "Stack" },
    { "id": "4",  "name": "Sliding Window" },
    { "id": "5",  "name": "Linked List" },
    { "id": "6",  "name": "Binary Search" },
    { "id": "7",  "name": "Trees" },
    { "id": "8",  "name": "Tries" },
    { "id": "9",  "name": "Heap / Priority Queue" },
    { "id": "10", "name": "Backtracking" },
    { "id": "11", "name": "Graphs" },
    { "id": "12", "name": "1-D Dynamic Programming" },
    { "id": "13", "name": "Intervals" },
    { "id": "14", "name": "2-D Dynamic Programming" },
    { "id": "15", "name": "Bit Manipulation" },
    { "id": "16", "name": "Greedy" },
    { "id": "17", "name": "Advanced Graphs" },
    { "id": "18", "name": "Math & Geometry" }
  ],
  "edges": [
    { "from": "1",  "to": "2",  "meaning": "prerequisite" },
    { "from": "1",  "to": "3",  "meaning": "prerequisite" },
    { "from": "2",  "to": "4",  "meaning": "prerequisite" },
    { "from": "2",  "to": "5",  "meaning": "prerequisite" },
    { "from": "2",  "to": "6",  "meaning": "prerequisite" },
    { "from": "5",  "to": "7",  "meaning": "prerequisite" },
    { "from": "6",  "to": "7",  "meaning": "prerequisite" },
    { "from": "7",  "to": "8",  "meaning": "prerequisite" },
    { "from": "7",  "to": "9",  "meaning": "prerequisite" },
    { "from": "7",  "to": "10", "meaning": "prerequisite" },
    { "from": "10", "to": "11", "meaning": "prerequisite" },
    { "from": "10", "to": "12", "meaning": "prerequisite" },
    { "from": "9",  "to": "13", "meaning": "prerequisite" },
    { "from": "9",  "to": "16", "meaning": "prerequisite" },
    { "from": "9",  "to": "17", "meaning": "prerequisite" },
    { "from": "11", "to": "14", "meaning": "prerequisite" },
    { "from": "11", "to": "17", "meaning": "prerequisite" },
    { "from": "11", "to": "18", "meaning": "prerequisite" },
    { "from": "12", "to": "14", "meaning": "prerequisite" },
    { "from": "12", "to": "15", "meaning": "prerequisite" },
    { "from": "15", "to": "18", "meaning": "prerequisite" }
  ]
}