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Random
Hot problems
WC '95 P4 - Wildcard
Pick It
Cheerio Contest 1 S2 - School Expansion
Appleby Contest '19 P5 - Matrix Operation
CCC '16 S4 - Combining Riceballs
Max's Anger Contest Series 2 P3 - Array Anger
SAC '22 Code Challenge 5 P2 - Querying Extensions
Problem
Category
Points
AC % ▾
Users
CCOQR '16 - Stupendous Bowties
CCC
10p
31.8%
247
CCO '04 P6 - Orko
CCO
15
31.6%
42
CCO '10 P5 - Space Miner
CCO
15
31.5%
52
CCO '08 P4 - Herding
CCO
10p
31.5%
221
Mock CCO '19 Contest 2 Problem 1 - A Dynamic Connectivity Problem
Mock CCO
15p
31.3%
70
CCO '08 P3 - Mobile
CCO
17p
31.3%
46
CCO '02 P5 - Connect The Campus
CCO
12
31.0%
101
CCO '08 P1 - Moving Day
CCO
7p
30.5%
106
CCO '19 P1 - Human Error
CCO
10p
30.4%
88
CCO '07 P6 - Road Construction
CCO
20p
30.4%
181
CCO '10 P2 - Tree Pruning
CCO
15
29.9%
188
CCO '20 P2 - Exercise Deadlines
CCO
15p
29.6%
291
Mock CCO '18 Contest 3 Problem 2 - Roger Delegates Work to Jessica
Mock CCO
20p
28.9%
23
CCO '99 P3 - Manelzuma's Revenge
CCO
10
28.6%
2
Mock CCO '18 Contest 4 Problem 4 - Time Travel
Mock CCO
15p
27.8%
56
Mock CCO '18 Contest 2 Problem 2 - Victor Rains
Mock CCO
20p
27.7%
21
CCO '11 P1 - Putnam
CCO
7
27.6%
108
CCO '22 P1 - Alternating Heights
CCO
12p
27.4%
138
Mock CCO '19 Contest 1 Problem 6 - A Geometry Problem
Mock CCO
15p
27.2%
16
CCO '96 P1 - Train Swapping
CCO
5
26.9%
212
CCO '19 P5 - Marshmallow Molecules
CCO
15p
26.6%
128
CCO '99 P1 - You Can't Get There From Here
CCO
7
26.5%
16
CCO Preparation Test 5 P1 - City Game
Mock CCO
15
26.4%
202
CCO '98 P1 - Fibonacci Numbers
CCO
7
26.2%
158
Mock CCO '17 Problem 2 - Penetrating Power
Mock CCO
17p
25.7%
171
CCO '19 P6 - Bad Codes
CCO
20p
25.6%
69
CCO '06 P1 - CN Tower
CCO
5
25.5%
141
CCO '03 P1 - BFed
CCO
10
25.4%
61
Mock CCO '17 Problem 1 - Fast Fuhrer Transform
Mock CCO
10p
25.4%
60
CCO '98 P4 - Scoring Curling
CCO
7p
25.0%
8
Mock CCO '18 Contest 4 Problem 5 - Spawn More Overlords
Mock CCO
20p
24.8%
35
Mock CCO '18 Contest 1 Problem 5 - A Counting Problem
Mock CCO
20p
24.5%
9
CCO '12 P2 - The Hungary Games
CCO
15
24.3%
480
CCO Preparation Test 6 P1 - Bus Routes
Mock CCO
20p
24.2%
6
CCO '05 P1 - Number Matrix
CCO
10
24.2%
161
Mock CCO '17 Problem 6 - Dire Consequences
Mock CCO
20
24.2%
25
CCO '12 P5 - Sample Size
CCO
7
24.0%
171
CCO '10 P3 - Wowow
CCO
15p
23.9%
282
CCO '98 P5 - Text Segmentation
CCO
10
23.7%
18
Mock CCO '18 Contest 4 Problem 3 - Counterattack
Mock CCO
15p
23.6%
284
CCO '19 P2 - Sirtet
CCO
20p
23.6%
85
CCO '13 P4 - A Romantic Movie Outing
CCO
20p
23.5%
91
CCO '23 P1 - Binaria
CCO
12p
23.4%
172
CCO '13 P3 - LHC
CCO
12p
23.3%
404
CCO '14 P5 - Early Exam Evacuation
CCO
20p
23.3%
87
CCO Preparation Test 6 P3 - HopScotch
Mock CCO
20p
23.1%
140
CCO '21 P5 - Bread First Search
CCO
20p
23.0%
63
CCO '11 P3 - Spies Like Us
CCO
10p
22.8%
203
CCO '12 P1 - Choose Your Own Arithmetic
CCO
7
22.8%
223
CCO '00 P5 - Millikan's Oil Droplet Experiment
CCO
7
22.3%
54
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