{
  "title": "Replace",
  "slug": "replace",
  "contestId": 1707,
  "index": "E",
  "rating": 3500,
  "officialUrl": "https://codeforces.com/problemset/problem/1707/E",
  "tags": ["interval dynamics", "binary lifting", "range queries", "sparse table"],
  "status": "solved",
  "order": 2,
  "summary": "Repeatedly replace an interval by the minimum and maximum values inside it, and find the first time it becomes [1, n]."
}