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Hot problems
CCC '15 S3 - Gates
CCC '16 S4 - Combining Riceballs
ECOO '19 R1 P1 - Free Shirts
Mock CCC '20 Contest 1 J4 - A Binary Problem
Problem
Category
Points
AC %
Users
Athena on Zanzibar Island
Olympiads School
12p
6.7%
32
Bad Paths
Uncategorized
12p
21.5%
49
Bubble Cup V8 F Bulbo
Bubble Cup
12
30.7%
78
Bubble Cup V8 H Bots
Bubble Cup
12
33.6%
388
Lexicographically Least Substring (Hard)
Uncategorized
15
11.1%
193
Next Prime (Hard)
Classics
15
8.0%
176
Back From Summer '17 P4: Pair Programming
Seasonal
12p
27.4%
50
Back From Summer '19 P6: Composite Zeyu
Seasonal
15p
37.9%
44
Bulgarian OI '09 P2 - Boxen
Bulgarian OI
12
41.5%
189
Bulgarian OI '09 P4 - Frogs
Bulgarian OI
12p
23.4%
130
Bulgarian OI '09 P6 - Diamonds
Bulgarian OI
12
22.5%
54
Bitmask Magic
Uncategorized
15p
29.4%
24
Balkan OI '11 P2 - Decrypt
Balkan OI
15p
52.6%
8
Balkan OI '11 P3 - Medians
Balkan OI
12p
28.5%
41
Boxlings
Uncategorized
15p
17.1%
45
BPC 1 S2 - Train Commute
Uncategorized
12p
6.7%
50
Bruce's Brittle Bridges
Uncategorized
12p
31.6%
70
Bruce String
Uncategorized
12p
22.0%
15
Polynomial Time Boolean Satisfiability
Uncategorized
15p
37.5%
49
Fast Search
Uncategorized
15p
27.3%
111
BSSPC '21 J6 - Lakshy and Orz Trees
Uncategorized
12
16.2%
85
Baltic OI '01 P5 - Mars Maps
Baltic OI
15p
14.7%
30
Baltic OI '02 P1 - Speed Limits
Baltic OI
12p
26.3%
16
Baltic OI '02 P2 - Tennis Club
Baltic OI
12p
34.0%
14
Baltic OI '02 P3 - Triangles
Baltic OI
12p
18.0%
8
Baltic OI '02 P4 - Bicriterial Routing
Baltic OI
12
20.8%
9
Baltic OI '03 P2 - Gems
Baltic OI
12p
48.1%
16
Baltic OI '03 P4 - The Gangs
Baltic OI
12p
41.1%
44
Baltic OI '03 P5 - Lamps
Baltic OI
15p
29.9%
17
Baltic OI '05 P1 - Camouflaged camp
Baltic OI
12
43.5%
43
Baltic OI '05 P3 - Maze
Baltic OI
12
30.0%
50
Baltic OI '05 P4 - Ancient Manuscript
Baltic OI
12
30.0%
19
Baltic OI '06 P1 - Bitwise Expressions
Baltic OI
15p
37.8%
9
Baltic OI '06 P2 - Coin Collector
Baltic OI
12
18.8%
24
Baltic OI '07 P4 - Building a Fence
Baltic OI
12p
19.2%
5
Baltic OI '07 P5 - Connected Points
Baltic OI
15p
36.1%
9
Baltic OI '07 P6 - Sequence
Baltic OI
12p
27.2%
30
Baltic OI '08 P2 - Gates
Baltic OI
15p
16.7%
1
Baltic OI '08 P4 - Elections
Baltic OI
12p
34.3%
18
Baltic OI '09 P1 - Beetle
Baltic OI
15
35.3%
49
Baltic OI '09 P2 - Candy Machine
Baltic OI
12p
36.7%
25
Baltic OI '09 P3 - Subway Signaling Error
Baltic OI
12p
34.0%
9
Baltic OI '10 P1 - BEARs
Baltic OI
15
30.4%
5
Baltic OI '10 P2 - Lego
Baltic OI
12p
53.8%
4
Baltic OI '10 P3 - Printed Circuit Board
Baltic OI
12p
46.8%
26
Baltic OI '10 P6 - Mines
Baltic OI
15p
9.1%
1
Baltic OI '11 P3 - Switch the Lamp On
Baltic OI
12p
25.5%
23
Baltic OI '11 P4 - Treasures and Vikings
Baltic OI
15p
31.0%
20
Baltic OI '12 P1 - Brackets
Baltic OI
15p
34.0%
13
Baltic OI '12 P2 - Mobile
Baltic OI
15p
10.4%
12
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