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Hot problems
Educational DP Contest AtCoder K - Stones
Educational DP Contest AtCoder N - Slimes
Educational DP Contest AtCoder I - Coins
Wesley's Anger Contest Reject 5 - Two Permutations
CCC '24 J5 - Harvest Waterloo
DMOPC '21 Contest 9 P3 - Terrible Trains
DWITE '07 R3 #4 - The Convex Fence Company
Problem
Category
Points
AC %
▴
Users
Waterloo 2001 Winter B - Tight words
Waterloo Local
7
66.7%
4
Waterloo 2013 Fall A - Compressed Words?
Waterloo Local
5
44.4%
6
Waterloo 2013 Fall B - Java vs. Scheme Smackdown
Waterloo Local
7
17.6%
3
Waterloo 2003 Spring B - Persistent Numbers
Waterloo Local
5
57.1%
4
Waterloo 2001 Fall 1 A - Average Speed
Waterloo Local
3
17.5%
8
Waterloo 2001 Fall 1 E - A Multiplication Game
Waterloo Local
7
16.1%
3
Waterloo 2001 Fall 1 C - Babelfish
Waterloo Local
5
28.9%
12
Waterloo 2005 Winter E - Traditional BINGO
Waterloo Local
5
66.7%
4
ETSR '23 Onsite Round 2 Problem 1 - Bracket
Uncategorized
12p
8.4%
26
UACC 1 P2 - Puzzling Parks
Uncategorized
5
27.8%
207
ETSR '23 Online Round 2 Problem 3 - Stone Game
Uncategorized
15p
5.2%
44
ETSR '23 Online Round 2 Problem 2 - Equation
Uncategorized
15p
4.4%
35
ETSR '23 Online Round 2 Problem 1 - Pencil
Uncategorized
3p
68.9%
144
ETSR '23 Online Round 2 Problem 4 - Queue
Uncategorized
17p
5.0%
15
ETSR '23 Onsite Round 1 Problem 3 - Travel
Uncategorized
17p
4.8%
20
ETSR '23 Onsite Round 1 Problem 2 - Origami
Uncategorized
15p
21.0%
24
ETSR '23 Onsite Round 1 Problem 1 - Arithmetic
Uncategorized
20p
4.3%
16
ETSR '23 Onsite Round 2 Problem 2 - Exponents
Uncategorized
25p
4.1%
13
ETSR '23 Onsite Round 2 Problem 3 - Trees
Uncategorized
30p
2.2%
8
UACC 1 P3 - Cheeky Checkers
Uncategorized
7
60.1%
141
Counting Problem
Uncategorized
17
45.5%
5
APIO '23 P1 - Cyberland
APIO
17p
9.1%
33
APIO '23 P2 - Sequence
APIO
25p
7.9%
17
APIO '23 P3 - Alice, Bob, and Circuit
APIO
45p
0.0%
0
CCO '23 P1 - Binaria
CCO
12p
23.2%
171
CCO '23 P2 - Real Mountains
CCO
17p
13.8%
68
Geography Class
Uncategorized
5p
14.1%
67
IOI '04 P3 - Polygon
IOI
20p
3.1%
1
CTSC '15 P5 - Calendar Management
China NOI
25
33.3%
1
Singularity Cup P5 - Perfect Matrix
Uncategorized
20
21.7%
48
Singularity Cup P4 - Staircase Sum
Uncategorized
17p
13.3%
65
Singularity Cup P6 - Explosive Breakout
Uncategorized
30p
19.7%
15
NOI '17 P4 - Game
China NOI
25p
16.7%
1
NOI '17 P5 - Vegetables
China NOI
25p
66.7%
4
NOI '17 P6 - Magic
China NOI
40p
40.0%
2
EGOI '23 P1 - Inflation
EGOI
7p
27.9%
132
EGOI '23 P2 - Padel Prize Pursuit
EGOI
10p
19.8%
32
EGOI '23 P3 - Find the Box
EGOI
17p
16.4%
17
EGOI '23 P4 - Bikes vs Cars
EGOI
20p
30.6%
10
EGOI '23 P6 - Candy
EGOI
12p
22.0%
38
EGOI '23 P7 - Sopsug
EGOI
17p
7.8%
13
NOI '17 P1 - Integers
China NOI
20p
29.1%
10
NOI '17 P2 - Queue
China NOI
20p
45.3%
9
NOI '17 P3 - Pool
China NOI
30p
38.9%
3
JOI '23 Open P1 - Ancient Machine 2
JOI
20p
1.4%
1
JOI '23 Open P2 - Cell Automaton
JOI
40p
0.0%
0
JOI '23 Open P3 - Garden
JOI
12p
9.4%
5
NOI '23 P1 - Square Coloring
China NOI
17p
52.6%
10
NOI '23 P2 - Osmanthus Tree
China NOI
25p
26.3%
5
NOI '23 P3 - Depth First Search
China NOI
35p
37.5%
2
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