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Problem Category Points AC % Users
Disjoint Set Test Data Structure Tests 10 36.9% 914
JOI '13 Open P2 - Synchronization JOI 35p 29.6% 57
JOI '13 Open P3 - Watching JOI 15p 29.9% 102
JOI '14 Open P1 - Factories JOI 20p 32.8% 158
JOI '14 Open P2 - Fortune Telling 2 JOI 25p 22.9% 93
JOI '14 Open P3 - Space Pirate JOI 50p 1.2% 1
JOI '14 Open P5 - Pinball JOI 25p 26.4% 99
JOI '14 Open P6 - Secret JOI 17p 16.0% 121
JOI '16 Final P1 - Foehn Phenomena JOI 10p 60.7% 26
JOI '16 Final P2 - Semiexpress JOI 12 54.8% 17
JOI '16 Open P2 - Selling RNA Strands JOI 20 17.4% 20
JOI '16 Open P3 - Skyscraper JOI 25p 41.6% 51
JOI '17 Final P4 - Commuter Pass JOI 15 25.7% 64
JOI '17 Final P5 - Snake Escaping JOI 25p 40.3% 20
JOI '18 Open P1 - Bubble Sort 2 JOI 20p 5.5% 29
JOI '18 Spring Camp Day 1 P1 - Construction of Highway JOI 30p 34.4% 29
JOI '18 Spring Camp Day 1 P2 - Fences JOI 30p 25.0% 1
JOI '18 Spring Camp Day 1 P3 - Tents JOI 20p 63.3% 34
JOI '19 Final P3 - Collecting Stamps 3 JOI 15 26.1% 42
JOI '19 Open P1 - Triple Jump JOI 30p 24.4% 17
JOI '19 Open P2 - Remittance JOI 30p 24.4% 14
JOI '19 Open P3 - Virus Experiment JOI 35p 8.3% 3
JOI '20 Open P1 - Furniture JOI 20p 32.3% 10
JOI '20 Open P2 - Monochrome Points JOI 35p 27.0% 9
JOI '20 Open P3 - Power Plant JOI 15p 39.1% 29
JOI '20 Spring Camp Day 1 P3 - Sweeping JOI 25p 18.2% 2
JOI '20 Spring Camp Day 2 P2 - Making Friends on Joitter is Fun JOI 30p 13.8% 8
JOI '20 Spring Camp Day 2 P3 - Ruins 3 JOI 40p 41.7% 3
JOI '20 Spring Camp Day 3 P1 - Constellation 3 JOI 30p 33.3% 5
JOI '20 Spring Camp Day 3 P2 - Harvest JOI 35p 27.3% 5
JOI '20 Spring Camp Day 4 P1 - Capital City JOI 20 44.7% 14
JOI '21 Open P1 - Crossing JOI 20p 44.4% 10
JOI '21 Open P2 - Financial Report JOI 25p 30.3% 29
JOI '21 Spring Camp Day 1 P1 - Aerobatics JOI 45p 0.0% 0
JOI '21 Spring Camp Day 3 P3 - Meetings 2 JOI 30p 19.1% 9
JOI '21 Spring Camp Day 4 P1 - Event Hopping 2 JOI 30p 60.0% 9
JOI '22 Final P1 - Intercastellar JOI 10p 58.2% 29
JOI '22 Final P2 - Self Study JOI 12p 26.8% 19
JOI '22 Open P1 - Seesaw JOI 17p 16.7% 8
JOI '22 Open P2 - Giraffes JOI 35p 11.1% 1
JOI '22 Open P3 - School Road JOI 17p 17.9% 6
JOI '22 Spring Camp Day 1 P1 - Jail JOI 30p 23.9% 6
JOI '23 Open P1 - Ancient Machine 2 JOI 20p 1.4% 1
JOI '23 Open P2 - Cell Automaton JOI 40p 5.9% 1
JOI '23 Open P3 - Garden JOI 12p 9.0% 6