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Hot problems
CCC '24 S2 - Heavy-Light Composition
CCC '18 S2 - Sunflowers
CCC '13 J4 - Time on task
Is it a Tree?
CCO '15 P2 - Artskjid
CCC '23 J3 - Special Event
CCC '24 S3 - Swipe
Problem
Category
Types
Points
AC %
Users
DWITE '10 R3 #4 - Forest Fires
DWITE
Graph Theory
7
40.2%
133
DWITE '10 R3 #5 - E-Searching
DWITE
Regular Expressions
7
42.4%
10
DWITE '10 R4 #1 - Future Printer
DWITE
Implementation
3
49.3%
36
DWITE '10 R4 #2 - Primal Numbers
DWITE
Simple Math
5
57.6%
30
DWITE '10 R4 #3 - Binary Weight
DWITE
Ad Hoc
5
22.2%
40
DWITE '10 R4 #4 - Mountain Hiking
DWITE
Graph Theory
7
39.7%
76
DWITE '10 R4 #5 - Sleepwalking Probabilities
DWITE
Brute Force
5
69.6%
12
DWITE '10 R5 #1 - Colourful Words
DWITE
Ad Hoc
5
50.9%
42
DWITE '10 R5 #2 - Safe from Rooks
DWITE
Ad Hoc
5
33.2%
237
DWITE '10 R5 #3 - Balancing Act
DWITE
Dynamic Programming
7
39.5%
170
DWITE '10 R5 #4 - New type of wordplay
DWITE
Dynamic Programming
,
String Algorithms
15
5.6%
16
DWITE '10 R5 #5 - Cube World
DWITE
Graph Theory
12
26.2%
113
DWITE '11 R1 #1 - Arab-lish Numbers
DWITE
String Algorithms
5
29.1%
46
DWITE '11 R1 #2 - Penny Game
DWITE
Ad Hoc
5
24.1%
112
DWITE '11 R1 #3 - Take a Walk
DWITE
Geometry
10
14.5%
18
DWITE '11 R1 #4 - C001 Numbers
DWITE
Implementation
3
28.0%
86
DWITE '11 R1 #5 - Tattarrattat
DWITE
Dynamic Programming
10
59.1%
148
DWITE '11 R2 #1 - Wandering Billy
DWITE
Implementation
5
35.0%
31
DWITE '11 R2 #2 - Scratch Card
DWITE
Greedy Algorithms
5
30.0%
36
DWITE '11 R2 #3 - Anonymous Shopping
DWITE
Ad Hoc
5
41.9%
11
DWITE '11 R2 #4 - Bear Trees
DWITE
Dynamic Programming
,
Graph Theory
10
21.6%
19
DWITE '11 R2 #5 - Portals Check
DWITE
Data Structures
,
Graph Theory
7
13.8%
165
DWITE '11 R3 #1 - Weighted Presents
DWITE
Implementation
3
56.5%
45
DWITE '11 R3 #2 - Magical Ponds
DWITE
Intermediate Math
5
27.3%
10
DWITE '11 R3 #3 - Combo Discounts
DWITE
Brute Force
5
42.1%
8
DWITE '11 R3 #4 - ABCA Maze
DWITE
Graph Theory
7
50.0%
77
DWITE '11 R3 #5 - Tautology
DWITE
Ad Hoc
10
38.9%
30
DWITE '11 R4 #1 - Crossword Count
DWITE
Ad Hoc
5
54.8%
20
DWITE '11 R4 #2 - Prime Time
DWITE
Simple Math
5
49.8%
287
DWITE '11 R4 #3 - Breaking Bonds
DWITE
Graph Theory
7
40.7%
21
DWITE '11 R4 #4 - Lego Ladder
DWITE
Dynamic Programming
10
29.6%
74
DWITE '11 R4 #5 - Comet Vomit
DWITE
Simple Math
12
48.0%
15
DWITE '11 R5 #1 - Age Gate
DWITE
Implementation
3
40.4%
139
DWITE '11 R5 #2 - Forest Fires
DWITE
Graph Theory
7
39.1%
97
DWITE '11 R5 #3 - Unit rectangles
DWITE
Simple Math
3
52.0%
72
DWITE '11 R5 #4 - Cube World
DWITE
Graph Theory
12
47.0%
74
DWITE '11 R5 #5 - Binary Weight
DWITE
Ad Hoc
5
22.1%
35
DWITE '12 R1 #1 - Candy Piles
DWITE
Implementation
3
36.4%
91
DWITE '12 R1 #2 - Candybar Graphs
DWITE
Simple Math
5
60.4%
46
DWITE '12 R1 #3 - Costume Party
DWITE
Ad Hoc
5
43.3%
52
DWITE '12 R1 #4 - Trick or Tree'ing
DWITE
Graph Theory
5
24.6%
292
DWITE '12 R1 #5 - Haunted House
DWITE
Ad Hoc
,
Brute Force
10
44.4%
10
DWITE '12 R2 #1 - Sugar Rush
DWITE
Simulation
3
30.6%
103
DWITE '12 R2 #2 - Word Arithmetic
DWITE
Ad Hoc
5
34.2%
22
DWITE '12 R2 #3 - Bitstrings
DWITE
Simple Math
3
35.0%
118
DWITE '12 R2 #4 - Magic Trick
DWITE
Greedy Algorithms
7
41.8%
215
DWITE '12 R2 #5 - Car Hoppers
DWITE
Dynamic Programming
7
28.4%
45
DWITE '12 R5 #1 - Travel Time
DWITE
Simple Math
5
45.1%
34
DWITE '12 R5 #2 - Copycat SMS
DWITE
String Algorithms
5
29.7%
134
DWITE '12 R5 #3 - Triangle Count
DWITE
Dynamic Programming
7
33.5%
173
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