2021 NA Regionals Practice Contest 5
Problems
| Name | Solved / Tries | Average tries | Average tries to solve | |
|---|---|---|---|---|
| A | Array of Discord | 30/119 (25%) | 3.50 | 3.47 |
| B | Big Brother | 3/14 (21%) | 2.80 | 2.00 |
| C | Coin Stacks | 31/138 (22%) | 3.94 | 3.48 |
| D | Dams in Distress | 25/51 (49%) | 1.82 | 1.60 |
| E | Exhaustive Experiment | 3/19 (16%) | 3.80 | 1.67 |
| F | Film Critics | 13/41 (32%) | 2.41 | 2.00 |
| G | Gig Combinatorics | 26/51 (51%) | 1.55 | 1.38 |
| H | Hiring and Firing | 4/46 (9%) | 3.54 | 4.00 |
| I | Infection Estimation | 5/83 (6%) | 8.30 | 6.20 |
| J | Joining Flows | 23/75 (31%) | 2.78 | 2.83 |
| K | Keep Calm And Carry Off | 11/35 (31%) | 2.33 | 2.27 |
| L | Language Survey | 0/0 (0%) | -- | -- |
| M | Methodic Multiplication | 35/44 (80%) | 1.26 | 1.26 |