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Hot problems
WC '01 P3 - Back to the Future
DWITE '10 R3 #3 - Dominos Tiling
A Math Contest P5 - Good Arrays
GFSSOC '15 Winter S1 - OR-deal
Counting Subsequences
DMOPC '17 Contest 4 P1 - Ribbon Colouring Fun
DMOPC '21 Contest 8 P1 - Peanut Planning
Problem
Category
Points
AC %
Users ▾
JOI '19 Open P2 - Remittance
JOI
30p
23.8%
12
NOI '22 P1 - Major
China NOI
25p
5.6%
12
Waterloo 2001 Fall 1 C - Babelfish
Waterloo Local
5
28.9%
12
IOI '23 P3 - Soccer Stadium
IOI
30p
4.7%
12
HHPC1 P5 - Yunity Grouping Objects
Uncategorized
17p
33.7%
12
Amplitude Hackathon '23 Problem 6 - Journeys
Uncategorized
10p
26.4%
12
COCI '23 Contest 5 #2 Bitovi
COCI
10p
10.2%
12
COCI '23 Contest 5 #3 Piratski Kod
COCI
15p
37.8%
12
Infinity Card Decks
Olympiads School
15p
15.7%
12
DMPG '16 G3 - Guerrilla Warfare
DMOPC
20p
16.3%
11
DMPG '16 S6 - Black and White II
DMOPC
15p
24.4%
11
New Year's '17 P8 - Boxen in Boxen
Seasonal
25
6.5%
11
TLE '16 Contest 6 (Mock CCC) S4 - Bubble Sort
TLE
25p
6.4%
11
Waterloo 2017 Winter E - Vera and Love Triangles
Waterloo Local
25
37.8%
11
DMPG '17 G4 - Timeline
DMOPC
20p
20.3%
11
ECOO '13 R2 P4 - Breaking Rocks
ECOO
10p
60.9%
11
Waterloo 2017 Fall B - Biology
Waterloo Local
5p
48.6%
11
DWITE '10 R4 #5 - Sleepwalking Probabilities
DWITE
5
71.4%
11
DWITE '09 R6 #3 - Bill Amendments
DWITE
5
25.5%
11
APIO '13 P1 - Robots
APIO
20p
9.4%
11
Inaho X
Uncategorized
7p
38.2%
11
Not an Aho-Corasick Problem
Uncategorized
20
10.0%
11
CCO '97 P6 - Aligning DNA
CCO
7
19.1%
11
CCO '00 P3 - The Game Of 31
CCO
15
54.5%
11
CCO '01 P2 - Coke or Chocolate Milk
CCO
12
17.1%
11
ACM-ICPC World Finals 2007 Problem J - Tunnels
ICPC
40
26.3%
11
DMOPC '19 Contest 1 P6 - Bob and Binary Strings
DMOPC
25p
6.0%
11
Wesley's Anger Contest 2 Problem 4 - The Ninth Triangle of the Underworld
WAC
20
14.1%
11
DMOPC '19 Contest 6 P5 - University Math
DMOPC
30p
6.6%
11
CEOI '16 P5 - Popeala
CEOI
25p
18.6%
11
CCO '06 P4 - CN Tower 2
CCO
30
5.4%
11
COCI '15 Contest 7 #5 Prosti
COCI
15
18.2%
11
NOI '07 P5 - Counting Spanning Trees
China NOI
30p
13.5%
11
NOI '13 P6 - Fast Food Restaurant
China NOI
30p
7.9%
11
NOI '06 P6 - The Magical Bag
China NOI
20p
18.8%
11
WC '15 Contest 2 J4 - The Force Awakens (Junior)
Woburn Challenge
15p
2.3%
11
WC '17 Finals S4 - Ultimatum
Woburn Challenge
17p
9.7%
11
Baltic OI '16 P2 - Park
Baltic OI
20p
51.7%
11
Circular Numbers
Uncategorized
10
15.8%
11
Balkan OI '11 P1 - Two Circles
Balkan OI
30p
11.5%
11
ICPC SWERC 2017 A - Cakey McCakeFace
ICPC
5
39.6%
11
COCI '20 Contest 2 #5 Svjetlo
COCI
25p
54.5%
11
Mock CCC '21 S5 - Clique and Independent Set
Mock CCC
25p
18.3%
11
COCI '16 Contest 4 #6 Osmosmjerka
COCI
20p
23.0%
11
COCI '12 Contest 5 #5 Rotiraj
COCI
15p
24.6%
11
DMOPC '21 Contest 1 P6 - Tree Jumping
DMOPC
25p
24.7%
11
ICPC NEERC 2012 L - Labyrinth of the Minotaur
ICPC
25
21.7%
11
UCRPC F21 H - Fetch Quest
ICPC
12p
13.7%
11
DMOPC '21 Contest 6 P5 - Contraband Game
DMOPC
25p
6.1%
11
Number Theoretic Transform
Uncategorized
12
25.7%
11
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