Example
INPUTRETURN
EXPLANATION
TODAY
Today’s game
One coding puzzle. The clock starts when you open it.
Connecting…
Leaderboard
Fastest correct solve| Rank | Player | Time |
|---|
How medals work
The three fastest finishers each day earn gold (3 points), silver (2), and bronze (1). Medals are awarded at 04:00 Prague time; DNF, unfinished, and late entries earn none. Random practice does not count.
Equal solve times are ordered by who submitted first, then by a fixed player ID if both match. Equal total points share a leaderboard rank.
AT YOUR OWN PACE
Practice problems
Pick a problem. No login needed, and practice does not affect rankings.
| Problem | Difficulty | Topics |
|---|
Your solution
Ctrl / ⌘ + Enter to runPython 3.14
Ln 1, Col 1Code stays in this tab · cleared on reload
Reveal the solution and finish as DNF.
Reference solution · read only
Input / output
Test input
JSON values; use double quotes for strings.
OUTPUT
Return your answer from solve.