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Hot problems
CCC '12 S3 - Absolutely Acidic
DMOPC '20 Contest 4 P1 - Missing Numbers
CCC '21 J3 - Secret Instructions
CCC '24 S2 - Heavy-Light Composition
COCI '06 Regional #3 Firefly
ACSL '09 Practice P4 - Rank
ECOO '19 R1 P1 - Free Shirts
Problem
Category
Points
AC %
Users ▾
Mock CCO '18 Contest 4 Problem 5 - Spawn More Overlords
Mock CCO
20p
24.8%
35
COCI '15 Contest 6 #2 Putovanje
COCI
5p
43.8%
35
COCI '18 Contest 3 #2 Pismo
COCI
5p
31.0%
35
CCO '02 P2 - Game Show Math
CCO
12
21.4%
35
CCO '06 P2 - R & J
CCO
10
20.8%
35
WC '02 P7 - Old Macdonald's Farm
Woburn Challenge
10
27.5%
35
WC '96 P2 - Row and Column
Woburn Challenge
7
13.3%
35
WC '16 Contest 4 S2 - Pawpsicles
Woburn Challenge
12p
30.6%
35
COCI '09 Contest 7 #3 Bakice
COCI
12
35.5%
35
Pillaging
Uncategorized
10p
14.0%
35
ICPC RMRC 2016 J - Stack Construction
ICPC
20
37.3%
35
COCI '11 Contest 2 #2 Okret
COCI
7p
56.1%
35
COCI '16 Contest 5 #2 Pareto
COCI
5p
35.8%
35
COCI '16 Contest 6 #5 Sirni
COCI
15p
13.6%
35
COCI '12 Contest 4 #2 Esej
COCI
5
36.0%
35
COCI '20 Contest 5 #5 Sjeckanje
COCI
20p
22.1%
35
CCO '01 P4 - Breaking Level (Standard I/O)
CCO
12
7.8%
35
Cheerio Contest 1 S5 - Coin Game
Uncategorized
15p
46.4%
35
ETSR '23 Online Round 2 Problem 2 - Equation
Uncategorized
15p
4.4%
35
COCI '23 Contest 2 #4 Kuglice
COCI
12p
35.9%
35
DMOPC '13 Contest 3 P4 - Snowman
DMOPC
15p
12.5%
34
IOI '15 P3 - Teams
IOI
35p
8.8%
34
COCI '15 Contest 1 #6 Uzastopni
COCI
20p
35.5%
34
HCI '16 - Ulam Spiral
Uncategorized
5p
17.0%
34
COCI '07 Contest 2 #6 Pravokutni
COCI
10
5.5%
34
CCO '17 P6 - Shifty Grid
CCO
30p
17.8%
34
DWITE '11 R5 #5 - Binary Weight
DWITE
5
21.8%
34
UTS Open '18 P7 - Gossip Network
Uncategorized
25p
9.2%
34
New Year's '19 P8 - Best Hat in Town II
Seasonal
25
18.3%
34
COCI '18 Contest 5 #4 Parametriziran
COCI
15p
18.3%
34
CCO '09 P3 - Beware the Geoducks
CCO
10
9.8%
34
CEOI '19 P5 - Magic Tree
CEOI
20p
9.3%
34
Baltic OI '19 P6 - Olympiads
Baltic OI
20p
20.3%
34
COCI '19 Contest 3 #4 Lampice
COCI
25p
11.1%
34
COCI '19 Contest 3 #5 Sob
COCI
15p
30.3%
34
ACM U of T Tryouts C3 G - Office Mates
ICPC
15
21.8%
34
IOI '99 P6 - A Strip of Land
IOI
20p
13.4%
34
WC '99 Suicidal P6 - Wedding Juicer
Woburn Challenge
15
16.0%
34
WC '15 Contest 3 S1 - Energy Absorption
Woburn Challenge
7p
14.3%
34
Baltic OI '05 P2 - LISP
Baltic OI
7
9.6%
34
Mock DWITE '09 P4 - Lights Out!
Uncategorized
15p
21.6%
34
System Solver
Uncategorized
15
9.8%
34
Caporegime
Uncategorized
10p
27.2%
34
COCI '10 Contest 4 #6 Hrpa
COCI
15p
45.5%
34
COCI '16 Contest 7 #1 Baza
COCI
5p
75.5%
34
COCI '11 Contest 4 #3 Keks
COCI
7p
18.5%
34
COCI '13 Contest 5 #6 Ladice
COCI
17p
35.3%
34
COCI '13 Contest 6 #2 Font
COCI
7p
31.6%
34
Segment Tree Practice 3
Uncategorized
15
48.2%
34
Spring Coding Bowl '22 P2 - Chicken Strips
Uncategorized
5p
7.0%
34
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