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Problem Category Points ▾ AC % Users
CCO '15 P5 - Timpanist CCO 20p 36.5% 102
CCOQR '16 - Through A Maze Darkly CCC 20p 18.3% 103
CCO Preparation Test 6 P1 - Bus Routes Mock CCO 20p 24.2% 6
CCO Preparation Test 6 P3 - HopScotch Mock CCO 20p 23.1% 140
CCO Preparation Test 7 P1 - Game of Stone Mock CCO 20p 6.4% 3
CCO Preparation Test 7 P2 - XOR Path Mock CCO 20p 13.5% 16
Mock CCO '17 Problem 3 - Connection Mock CCO 20p 12.5% 38
Mock CCO '17 Problem 6 - Dire Consequences Mock CCO 20 24.2% 25
CCO '17 P2 - Cartesian Conquest CCO 20p 9.4% 55
CCO '17 P4 - Rainfall Storage CCO 20p 36.2% 177
CCO '17 P5 - Professional Network CCO 20p 32.5% 166
Mock CCO '18 Contest 1 Problem 5 - A Counting Problem Mock CCO 20p 24.5% 9
Mock CCO '18 Contest 2 Problem 2 - Victor Rains Mock CCO 20p 27.7% 21
Mock CCO '18 Contest 2 Problem 3 - Victor Trains Mock CCO 20p 14.0% 7
Mock CCO '18 Contest 2 Problem 4 - Victor's Rectangles Mock CCO 20p 21.9% 22
Mock CCO '18 Contest 2 Problem 5 - Victor's Triangles Mock CCO 20p 33.2% 49
Mock CCO '18 Contest 2 Problem 6 - Victor's Cubes Mock CCO 20p 18.3% 9
Mock CCO '18 Contest 3 Problem 2 - Roger Delegates Work to Jessica Mock CCO 20p 28.9% 23
Mock CCO '18 Contest 3 Problem 3 - Roger Just Plays Some More Chess Mock CCO 20p 12.3% 33
Mock CCO '18 Contest 4 Problem 5 - Spawn More Overlords Mock CCO 20p 24.8% 35
CCO '18 P5 - Boring Lectures CCO 20p 19.1% 125
CCO '09 P1 - Invasion of the Boxes CCO 20p 12.8% 22
CCO '09 P2 - Dinner CCO 20p 9.8% 50
CCO '09 P4 - Bottle Caps CCO 20p 14.2% 37
CCO '19 P2 - Sirtet CCO 20p 24.3% 81
CCO '19 P6 - Bad Codes CCO 20p 25.4% 68
CCO '03 P3 - Cube CCO 20p 12.4% 14
CCO '05 P2 - The Great Spamway Strike CCO 20 40.8% 43
CCO '03 P6 - Cheap Gas CCO 20p 13.1% 79
CCO '21 P5 - Bread First Search CCO 20p 23.0% 63
CCO '05 P3 - That's News To Me CCO 20 0.0% 0
CCO '22 P4 - Bi-ing Lottery Treekets CCO 20p 20.6% 29
CCO '22 P5 - Phone Plans CCO 20p 12.7% 31
The Contest Contest 1 P5 - A Typical CCO Problem Uncategorized 20p 4.2% 24
CCO '14 P3 - Werewolf CCO 17p 42.1% 194
CCO Preparation Test 1 P3 - K-th Rank Student Mock CCO 17p 35.2% 151
CCO Preparation Test 2 P1 - Concatenation Mock CCO 17p 13.1% 32
Mock CCO '17 Problem 2 - Penetrating Power Mock CCO 17p 25.6% 170
Mock CCO '17 Problem 5 - Blitzkrieg Mock CCO 17p 12.4% 13
CCO '09 P5 - Parade CCO 17p 17.3% 43
CCO '08 P3 - Mobile CCO 17p 31.3% 46
CCO '21 P1 - Swap Swap Sort CCO 17p 16.8% 152
CCO '21 P2 - Weird Numeral System CCO 17p 12.1% 87
CCO '22 P2 - Rainy Markets CCO 17p 18.7% 101
CCO '23 P2 - Real Mountains CCO 17p 14.3% 65
CCO '23 P4 - Flip it and Stick it CCO 17p 6.9% 51
CCO '10 P2 - Tree Pruning CCO 15 29.7% 188
CCO '10 P3 - Wowow CCO 15p 23.9% 282
CCO '10 P5 - Space Miner CCO 15 31.5% 52
CCO '11 P2 - Vampire Tunnels CCO 15p 19.0% 318