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Random
Hot problems
CCC '16 S4 - Combining Riceballs
WC '01 P3 - Back to the Future
APIO '10 P1 - Commando
GFSSOC '15 Winter S1 - OR-deal
DMOPC '17 Contest 4 P1 - Ribbon Colouring Fun
Bubble Sort
ECOO '20 P2 - Online Shopping
Problem
Category
Points
AC %
Users ▴
COI '07 #3 Tamnica
COCI
15p
13.0%
29
ECOO '14 R3 P4 - Baby Talk
ECOO
10p
59.1%
29
Back From Summer '17 P5: Confusing Codeforces Contest
Seasonal
25p
14.0%
29
DWITE '11 R3 #5 - Tautology
DWITE
10
39.7%
29
DMPG '18 G5 - Triangles
DMOPC
15p
20.5%
29
DMPG '18 G2 - Gardening Fun
DMOPC
15p
44.5%
29
CCO '96 P6 - Hoppers
CCO
15
15.5%
29
COCI '17 Contest 2 #6 Garaža
COCI
20
21.8%
29
CCO '01 P5 - Fast Food
CCO
7
10.1%
29
Wesley's Anger Contest 2 Problem 3 - Pumpkin Counting
WAC
15
22.6%
29
Figurines
Uncategorized
20
21.1%
29
JOI '18 Spring Camp Day 1 P3 - Tents
JOI
20p
66.0%
29
ACM U of T Tryouts C3 F - A Pleasant Stroll
ICPC
15
17.2%
29
ACSL '09 Practice P6 - Expression
Uncategorized
10p
11.4%
29
WC '17 Contest 1 S2 - Ride the Rocket
Woburn Challenge
10p
30.3%
29
Baltic OI '17 P1 - Political Development
Baltic OI
25p
23.2%
29
Andrew Needs Help
Uncategorized
12p
26.2%
29
Mock CCC '21 S4 - Infinite Molecule
Mock CCC
12p
8.2%
29
COCI '16 Contest 5 #4 Ronald
COCI
12p
46.1%
29
COCI '11 Contest 6 #4 Rez
COCI
10p
36.2%
29
IOI '21 P1 - Distributing Candies
IOI
30p
13.4%
29
Checker Number
Uncategorized
7
18.8%
29
COCI '21 Contest 2 #4 Magneti
COCI
25p
25.6%
29
An Animal Contest 6 P4 - Buffet
AAC
20p
7.3%
29
Baltic OI '01 P5 - Mars Maps
Baltic OI
15p
14.7%
29
NOIP '08 P1 - Silly Monkey
China NOI
5p
38.4%
29
Wesley's Anger Contest Reject 6 - Geology
WAC
12p
17.5%
29
Amplitude Hackathon '23 Practice Problem 4 - Gigatron Autoscaling
Uncategorized
3p
64.9%
29
Mock CCC '24 Contest 1 S4 - Tommy's Lemonade Stand
Mock CCC
12p
22.0%
29
COCI '23 Contest 3 #3 Milano C.le
COCI
10p
35.2%
29
Tree Journey
Olympiads School
12p
50.8%
29
COCI '14 Contest 5 #6 Divljak
COCI
40p
16.7%
30
DMPG '15 G2 - 1-String B2-VPG Representation of Planar Graphs
DMOPC
15p
18.4%
30
MWC '15 #1 P4: Genetic Probability
MWC
5p
29.2%
30
TLE '16 Contest 1 P3 - Joey and Chemistry
TLE
7p
14.6%
30
ECOO '12 R1 P3 - Triangles
ECOO
5p
23.9%
30
IOI '17 P6 - Ancient Books
IOI
25p
11.4%
30
Summer Institute '17 Contest 1 P1 - Ant Clans
SIUCF
20p
16.9%
30
CTU Open Contest 2017 - Amusement Anticipation
ICPC
5
23.9%
30
DMOPC '18 Contest 1 P6 - Sorting
DMOPC
20p
18.7%
30
Inaho XI
Uncategorized
5p
44.5%
30
CTU Open Contest 2018 - Security Guards
ICPC
10
36.5%
30
Mock CCO '19 Contest 2 Problem 6 - A Fundraising Problem
Mock CCO
12p
15.8%
30
APIO '19 P3 - Street Lamps
APIO
35p
10.8%
30
COCI '19 Contest 1 #3 Džumbus
COCI
20p
21.1%
30
Wesley's Anger Contest 4 Problem 7 - Squirrel Cities
WAC
25p
6.8%
30
COCI '15 Contest 7 #4 Otpor
COCI
12
69.2%
30
NOI '13 P4 - Matrix Game
China NOI
20p
17.6%
30
SMAC 08/09 (Oct) #5 - Crossroads
Uncategorized
12p
25.1%
30
WC '17 Contest 2 S3 - Battle of the Pelennor Fields
Woburn Challenge
12p
34.4%
30
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