Virtual contest · solo
XVIII Open Olympiad in Informatics - Final Stage, Day 1 (Unrated, Online Mirror, IOI rules)
4 problems · duration 5:00:00
Hit Start contest to begin the countdown. Problems below open in a new tab when you click them — close the tab when you're finished with a problem. Click ✓ next to a problem when you AC'd it on cf-mirror or CF.
| Idx | Name | Rating | Status |
|---|---|---|---|
| A | Draw Polygon Lines | — | |
| B | Evidence Board | — | |
| C | More Gifts | — | |
| D | Big Persimmon | — |