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Problem Category Points ▴ AC % Users
CCO '96 P1 - Train Swapping CCO 5 26.9% 212
CCO '06 P1 - CN Tower CCO 5 25.4% 140
CCO '04 P1 - Scribble CCO 5 45.4% 126
CCO '03 P4 - Constrained Permutations CCO 5 49.8% 163
CCO '08 P1 - Moving Day CCO 7p 30.5% 106
CCO '11 P1 - Putnam CCO 7 27.6% 108
CCO '11 P4 - Reorganization CCO 7p 35.1% 215
CCO '12 P1 - Choose Your Own Arithmetic CCO 7 22.8% 223
CCO '14 P4 - Where's That Fuel? CCO 7p 34.3% 385
CCO '12 P5 - Sample Size CCO 7 24.0% 171
CCO '17 P1 - Vera and Trail Building CCO 7p 38.5% 412
CCO '08 P5 - Candy CCO 7p 18.2% 235
CCO '96 P4 - Where's Waldorf? CCO 7 47.2% 81
CCO '96 P5 - All Roads Lead Where? CCO 7 62.6% 271
CCO '98 P1 - Fibonacci Numbers CCO 7 26.2% 158
CCO '97 P6 - Aligning DNA CCO 7 19.1% 11
CCO '98 P2 - Message Deciphering CCO 7 51.9% 20
CCO '98 P4 - Scoring Curling CCO 7p 25.0% 8
CCO '99 P1 - You Can't Get There From Here CCO 7 26.5% 16
CCO '00 P4 - Packet Routing CCO 7 59.5% 57
CCO '00 P5 - Millikan's Oil Droplet Experiment CCO 7 22.3% 54
CCO '01 P5 - Fast Food CCO 7 10.1% 29
CCO '04 P5 - Jengaism CCO 7 31.8% 116
CCO '03 P5 - Longest Substring CCO 7p 15.8% 86
CCO '14 P1 - Troyangles CCO 10p 37.8% 619
CCO '07 P1 - Cows CCO 10 32.3% 181
CCO '07 P2 - Snowflakes CCO 10 14.4% 964
CCO '08 P4 - Herding CCO 10p 31.5% 221
CCO '10 P1 - Barking Dogs! CCO 10 33.9% 232
CCO '10 P4 - Computer Purchase Return CCO 10 39.0% 363
CCO '10 P6 - Shuffle CCO 10 35.4% 150
CCO '11 P3 - Spies Like Us CCO 10p 22.8% 203
CCO '12 P4 - Editor Distance CCO 10 33.6% 143
CCO '13 P1 - All Your Base Belong to Palindromes CCO 10p 18.6% 208
CCO '15 P4 - Cars on Ice CCO 10p 19.0% 206
CCO '16 P1 - Field Trip CCO 10p 21.8% 171
CCO '16 P4 - O Canada CCO 10p 36.4% 263
CCO '99 P2 - Common Words CCO 10 12.3% 315
CCO '05 P5 - Segments CCO 10p 44.3% 284
CCO '05 P1 - Number Matrix CCO 10 24.2% 161
CCO '00 P1 - Subsets CCO 10 35.0% 269
CCO '18 P1 - Geese vs. Hawks CCO 10p 37.9% 569
CCO '96 P2 - SafeBreaker CCO 10 36.2% 89
CCO '97 P1 - Palindromes CCO 10 11.0% 21
CCO '97 P2 - Alien Invasion CCO 10 43.4% 54
CCO '97 P3 - Porous Stone CCO 10 33.3% 2
CCO '97 P4 - High Tide CCO 10 11.8% 3
CCO '97 P5 - Space Aliens CCO 10 46.7% 3
CCO '98 P5 - Text Segmentation CCO 10 23.7% 18
CCO '99 P3 - Manelzuma's Revenge CCO 10 28.6% 2