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Problem Category Points AC % Users
Waterloo 2001 Winter D - Division Waterloo Local 7 7.1% 7
Waterloo 2003 Spring B - Persistent Numbers Waterloo Local 5 32.0% 8
Waterloo 2005 Winter E - Traditional BINGO Waterloo Local 5 45.0% 8
Waterloo 2008 Spring A - Trainsorting Waterloo Local 10 6.3% 5
Waterloo 2008 Spring E - Balance Waterloo Local 15 7.7% 1
Waterloo 2013 Fall A - Compressed Words? Waterloo Local 5 52.9% 11
Waterloo 2013 Fall B - Java vs. Scheme Smackdown Waterloo Local 7 13.2% 5
Waterloo 2016 Fall C - Wizard of Odds Waterloo Local 5 28.1% 14
Waterloo 2016 Fall D - Treasure Hunt Waterloo Local 5 34.5% 23
Waterloo 2017 Fall A - Art Waterloo Local 3p 48.2% 127
Waterloo 2017 Fall B - Biology Waterloo Local 5p 47.1% 18
Waterloo 2017 Fall C - Computer Science Waterloo Local 10p 29.4% 31
Waterloo 2017 Fall D - Drama Waterloo Local 20p 37.5% 6
Waterloo 2017 Fall E - English Waterloo Local 15p 41.7% 5
Waterloo 2017 Winter A - Vera and Outfits Waterloo Local 3 71.2% 599
Waterloo 2017 Winter B - Vera and LCS Waterloo Local 10 17.3% 206
Waterloo 2017 Winter C - Vera and Mean Sorting Waterloo Local 10 31.6% 23
Waterloo 2017 Winter D - Vera and Sorting Waterloo Local 15 47.2% 31
Waterloo 2017 Winter E - Vera and Love Triangles Waterloo Local 25 33.3% 12
Waterloo 2022 Fall A - Zero AAMP Currents Waterloo Local 10 59.5% 41
Waterloo 2022 Fall B - Lightbulbs Waterloo Local 15 20.9% 18
Waterloo 2022 Fall C - Squaring the Triangle Waterloo Local 17 34.9% 31
Waterloo 2022 Fall D - Course Selection Waterloo Local 5 64.7% 61
Waterloo 2022 Fall E - Water Flow Waterloo Local 12 20.3% 9
Waterloo 2023 Fall A - Black Frame Waterloo Local 12 27.1% 16
Waterloo 2023 Fall B - Orb Tent Waterloo Local 17 30.8% 13
Waterloo 2023 Fall C - Whitewater Rafting Waterloo Local 17 18.8% 20
Waterloo 2023 Fall D - Reptilian Communism Waterloo Local 7 25.8% 28
Waterloo 2023 Fall E - Loose Goose Waterloo Local 25 5.1% 2
Waterloo 2023 Winter A - So I'll Max Out My Constructive Algorithm Skills Waterloo Local 5 33.3% 33
Waterloo 2023 Winter B - Laser Trap Waterloo Local 12 20.5% 18
Waterloo 2023 Winter C - Sandpile on Clique Waterloo Local 10 22.8% 18
Waterloo 2023 Winter D - Link-Cut Tree Waterloo Local 10 59.0% 20
Waterloo 2023 Winter E - Colourful Tree Waterloo Local 25 7.9% 8
Waterloo 2025 Fall A - Planting Trees Waterloo Local 30 23.8% 15
Waterloo 2025 Fall B - Palindromic Triplets Waterloo Local 20 30.8% 18
Waterloo 2025 Fall C - Magic Matrix Waterloo Local 12 60.7% 15
Waterloo 2025 Fall D - The Worm in the Apple Waterloo Local 20 17.0% 8
Waterloo 2025 Fall E - Efficient Room Scheduling Waterloo Local 5 58.6% 39
WC '01 P1 - The Rock Woburn Challenge 7 69.9% 30
WC '01 P2 - The Island Of Dr. Strangelove Woburn Challenge 10 42.9% 9
WC '01 P3 - Back to the Future Woburn Challenge 5 63.8% 231
WC '01 P4 - Cool Runnings Woburn Challenge 10 23.7% 19
WC '01 P5 - The Man With The Golden Eye Woburn Challenge 12 14.5% 17
WC '01 P6 - Mission Impossible 3 Woburn Challenge 5p 18.4% 94
WC '01 P7 - The Sixth Sense Woburn Challenge 15 9.0% 4
WC '01 P8 - Time to Get Medieval Woburn Challenge 10 39.4% 43
WC '01 P9 - The Thirteenth Floor Woburn Challenge 15 29.6% 6
WC '01 Suicidal P1 - Survivor Woburn Challenge 10 8.9% 15
WC '01 Suicidal P2 - Temptation Island Woburn Challenge 10 35.1% 32