2020 NA Regionals Practice Contest 15
Problems
| Name | Solved / Tries | Average tries | Average tries to solve | |
|---|---|---|---|---|
| A | Array of Discord | 53/177 (30%) | 2.95 | 2.72 |
| B | Big Brother | 6/30 (20%) | 3.00 | 3.17 |
| C | Coin Stacks | 49/140 (35%) | 2.46 | 2.47 |
| D | Dams in Distress | 46/83 (55%) | 1.73 | 1.70 |
| E | Exhaustive Experiment | 3/13 (23%) | 2.17 | 2.67 |
| F | Film Critics | 16/40 (40%) | 1.82 | 1.94 |
| G | Gig Combinatorics | 43/104 (41%) | 1.93 | 1.58 |
| H | Hiring and Firing | 2/80 (2%) | 4.44 | 7.00 |
| I | Infection Estimation | 1/18 (6%) | 6.00 | 5.00 |
| J | Joining Flows | 26/70 (37%) | 2.00 | 1.88 |
| K | Keep Calm And Carry Off | 20/113 (18%) | 3.65 | 3.30 |
| L | Language Survey | 0/0 (0%) | -- | -- |
| M | Methodic Multiplication | 60/97 (62%) | 1.56 | 1.57 |