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Random
Hot problems
COCI '14 Contest 6 #4 Kratki
ACSL '09 Practice P4 - Rank
IOI '00 P1 - Palindrome
CCC '17 S3 - Nailed It!
COCI '10 Contest 2 #2 Napor
DMOPC '14 Contest 4 P3 - Golden Lily
DMOPC '17 Contest 4 P4 - Cops and Robbers
Problem
Category
Points
AC %
Users ▴
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
45.9%
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 4 #3 Sumo
COCI
10p
28.6%
34
COCI '13 Contest 5 #6 Ladice
COCI
17p
35.3%
34
COCI '13 Contest 6 #2 Font
COCI
7p
31.6%
34
Spring Coding Bowl '22 P2 - Chicken Strips
Uncategorized
5p
7.0%
34
DMOPC '21 Contest 7 P4 - Rocket Race
DMOPC
17p
7.1%
34
Another Random Contest 1 P4 - Bracket Query
Uncategorized
15p
44.3%
34
COCI '21 Contest 6 #2 Zemljište
COCI
10p
8.7%
34
COCI '22 Contest 2 #3 Lampice
COCI
17p
25.5%
34
WOSS Dual Olympiad 2022 J4: Fire on Christmas Day
Seasonal
7p
13.7%
34
COCI '23 Contest 2 #4 Kuglice
COCI
12p
35.1%
34
Mock CCC '24 Contest 1 J5 - Mathland
Mock CCC
10p
8.1%
34
Collate The Findings
Uncategorized
0
15.3%
34
IOI '16 P2 - Roller Coaster Railroad
IOI
35p
45.1%
35
ECOO '15 R3 P1 - Just the Factoradics, Ma'am
ECOO
7p
46.0%
35
ECOO '14 R1 P2 - Orphan Black
ECOO
5p
66.1%
35
ECOO '14 R1 P4 - Fischer Random Chess
ECOO
5p
38.3%
35
COCI '08 Contest 4 #3 Rot
COCI
5
27.9%
35
DWITE '11 R2 #2 - Scratch Card
DWITE
5
29.5%
35
DWITE '07 R3 #5 - Portals
DWITE
7
48.9%
35
Summer Institute '17 Contest 1 P4 - Clips of Video
SIUCF
20
43.7%
35
Summer Institute '17 Contest 1 P6 - Fortunate Farmland
SIUCF
10
23.0%
35
Valentine's Day '18 S3 - Carol's Cactesian Conquest
Mock CCC
17p
40.6%
35
TLE '17 Contest 7 P4 - Database
TLE
20p
24.3%
35
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
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