https://open.kattis.com/problem-sources/2020-2021%20ACM-ICPC%2C%20Asia%20Nanjing%20Regional%20Contest

source 8440ffaecc4d · match key open.kattis.com/problem-sources/2020-2021%20acm-icpc%2c%20asia%20nanjing%20regional%20contest · all sources

live

https://open.kattis.com/problem-sources/2020-2021%20ACM-ICPC%2C%20Asia%20Nanjing%20Regional%20Contest

wayback

calendar of snapshots

roles

judge page

health

live checked 2026-11-03 — mentions year 2020±1 (no snapshot to compare)
live: the address still serves the contest-era content (identical or ≥75% similar to the near-contest snapshot, or mentions the contest year)

referenced by

nanjing-2020 judge page · Kattis — Kattis problem-sources page (export source "2020-2021 ACM-ICPC, Asia Nanjing Regional Contest", 2026-11-02)

Snapshots (1)

One entry per time this address is known at: Wayback snapshots we captured, our live fetches, and times the catalogue declares (as_of) without a capture. Each capture is our stored copy, with its provenance.

Checks (2)

Every time this address was looked at and what came back. A check that found no content is a record of the attempt, not a snapshot.