2021 North Central NA Regional Contest
Problems
| Name | Solved / Tries | Average tries | Average tries to solve | |
|---|---|---|---|---|
| A | Even Substrings | 2/61 (3%) | 3.21 | 2.00 |
| B | Tree Number Generator | 2/22 (9%) | 2.00 | 2.50 |
| C | Subprime | 25/170 (15%) | 3.54 | 3.32 |
| D | Ultimate Binary Watch | 83/242 (34%) | 2.72 | 2.48 |
| E | Land Equality | 14/137 (10%) | 3.81 | 3.43 |
| F | Word Puzzle | 6/26 (23%) | 2.36 | 2.50 |
| G | Code Guessing | 70/261 (27%) | 3.03 | 2.80 |
| H | Lone Rook | 1/21 (5%) | 3.50 | 1.00 |
| I | Parking Lot | 1/3 (33%) | 1.50 | 1.00 |
| J | Stream Lag | 52/156 (33%) | 2.33 | 1.63 |
| K | Bracket Pairing | 7/23 (30%) | 1.92 | 1.71 |
| L | Espresso! | 82/249 (33%) | 2.71 | 2.55 |
| M | Concert Rehearsal | 7/167 (4%) | 3.04 | 1.71 |