/**
 * LeetCode topic-tag slug → the campaign landing routes that teach it, in
 * default preference order. The one answer to "does the campaign cover this
 * tag", read by two sides that must agree:
 *
 * - `components/ProblemBadges.astro` links a covered tag's badge to its
 *   landing page, and every other tag's badge to `/guides/<slug>`;
 * - `apps/cli/sync.ts` creates a placeholder `content/guides/<slug>.mdx` for
 *   every tag a problem page carries that is NOT a key here.
 *
 * Add a key when a campaign topic starts teaching a tag; its guide page is then
 * dead weight, delete it by hand. A tag naming two topics (DFS/BFS: tree and
 * graph; DP: 1-D and grid) lists both; the badge picks per page.
 */
export const TOPIC_LANDINGS: Record<string, readonly string[]> = {
  "hash-table": ["/hash-table"],
  "prefix-sum": ["/prefix-sum"],
  "two-pointers": ["/two-pointers"],
  "sliding-window": ["/sliding-window"],
  "binary-search": ["/binary-search"],
  stack: ["/stack"],
  "monotonic-stack": ["/monotonic-stack"],
  "linked-list": ["/linked-list"],
  matrix: ["/matrix-index-math"],
  "depth-first-search": ["/tree-dfs", "/graph-dfs"],
  "breadth-first-search": ["/tree-bfs", "/graph-bfs"],
  "binary-search-tree": ["/binary-search-tree"],
  "heap-priority-queue": ["/heap-priority-queue"],
  trie: ["/trie"],
  "topological-sort": ["/topological-sort"],
  "union-find": ["/union-find"],
  backtracking: ["/backtracking"],
  "dynamic-programming": ["/1d-dynamic-programming", "/multi-d-grid-dp"],
  greedy: ["/greedy"],
};