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Hot problems
CCC '19 S2 - Pretty Average Primes
WC '18 Contest 3 S2 - Gym Tour
UACC 1 P3 - Cheeky Checkers
IOI '06 P2 - Pyramid
Knapsack 4
COCI '12 Contest 3 #3 Malcolm
CCC '24 J5 - Harvest Waterloo
Problem
Category
Points ▾
AC %
Users
ECOO '20 P3 - Captcha Fun
ECOO
7p
24.9%
103
UCC Coding Competition '20 P4 - Bubble Tea
Uncategorized
7p
43.7%
222
UCC Coding Competition '20 P5 - Public Transport
Uncategorized
7p
53.8%
164
Mathtermind
Uncategorized
7
42.2%
9
CCO '04 P5 - Jengaism
CCO
7
31.8%
116
COCI '15 Contest 7 #2 Prozor
COCI
7p
37.9%
21
COCI '09 Contest 4 #3 IKS
COCI
7
34.2%
68
ACM U of T Tryouts C1 C - Foxhole
ICPC
7
31.5%
127
ACM U of T Tryouts C2 D - Diablo Bot
ICPC
7p
8.2%
97
ACM U of T Tryouts C1 E - Foxling Feeding Frenzy
ICPC
7
30.2%
117
WC '18 Contest 1 S2 - Essay Generator
Woburn Challenge
7p
37.5%
221
WC '18 Contest 1 S1 - Inspiration
Woburn Challenge
7p
29.0%
67
IOI '09 P5 - Garage
IOI
7
46.4%
530
IOI '09 P3 - POI
IOI
7
28.8%
527
NOI '98 P1 - Personal Income Tax
China NOI
7
57.5%
20
NOI '00 P4 - Trie
China NOI
7
50.3%
120
NOI '97 P2 - Optimal Routing
China NOI
7p
28.5%
59
NOI '97 P1 - Competition Ranking
China NOI
7
32.3%
38
NOI '11 P4 - Road Construction
China NOI
7p
44.8%
101
Maximum Sum
Uncategorized
7
33.4%
787
Longest Increasing Subsequence
Uncategorized
7
29.4%
647
PEG Test '14 - Air
Uncategorized
7
21.1%
48
PEG Test '14 - Change
Uncategorized
7
39.3%
50
BlueBook - Bills Bills Bills
BlueBook
7
13.7%
147
BlueBook - Calculator
BlueBook
7
21.2%
143
Graph Contest 2 P1 - Connected Components
Uncategorized
7
36.2%
250
Graph Contest 3 P1 - Travelling Salesmen
Uncategorized
7
33.9%
298
Graph Contest 2 P3 - Trees
Uncategorized
7
33.5%
148
Graph Contest 3 P3 - Cable TV
Uncategorized
7
39.1%
185
ACSL '09 Practice P1 - Kansas
Uncategorized
7
14.7%
67
ACSL '09 Practice P4 - Rank
Uncategorized
7
45.8%
846
ICPC NEERC 2010 A - Alignment of Code
ICPC
7
54.0%
21
CCO '03 P5 - Longest Substring
CCO
7p
15.8%
86
MMM '14 A - Distinct Prime Factors
Uncategorized
7
26.4%
226
Mock CCC '14 S3 - Spreadsheet Sorting
Mock CCC
7
49.0%
425
Mock CCC '14 S2 - Sleep Cycle
Mock CCC
7p
15.9%
103
Mock CCC '14 J4 - Selecting Shifts
Mock CCC
7p
11.5%
52
Alawn's Problem
Uncategorized
7
41.4%
25
COCI '09 Contest 5 #3 Kletva
COCI
7
21.5%
32
COCI '12 Contest 1 #2 F7
COCI
7
50.7%
33
COCI '12 Contest 1 #3 Koncert
COCI
7
25.4%
10
COCI '10 Contest 1 #3 Sretan
COCI
7
40.3%
53
WC '18 Contest 3 J4 - Leveling Up
Woburn Challenge
7p
32.1%
84
WC '16 Contest 4 J2 - You're Dead!
Woburn Challenge
7p
31.3%
43
WC '18 Contest 4 J4 - Your Name, Please
Woburn Challenge
7p
13.6%
14
WC '96 P2 - Row and Column
Woburn Challenge
7
13.3%
35
WC '18 Contest 2 J4 - Ammunition
Woburn Challenge
7p
21.0%
49
WC '95 P1 - Coded Message
Woburn Challenge
7
8.9%
54
WC '18 Contest 2 S1 - Laser Grid
Woburn Challenge
7p
57.3%
113
WC '15 Contest 3 S1 - Energy Absorption
Woburn Challenge
7p
14.3%
34
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