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Hot problems
Knapsack 4
IOI '04 P4 - Phidias
WC '17 Contest 3 J3 - Uncrackable
DMOPC '19 Contest 5 P1 - Conspicuous Cryptic Checklist
DMOPC '18 Contest 1 P2 - Sorting
IOI '07 P4 - Miners
IOI '94 P1 - The Triangle
Problem
Category
Points
AC %
Users ▾
COCI '08 Contest 5 #6 Kruska
COCI
10p
52.6%
23
DMPG '18 G3 - Lonely Carrot's Anguish
DMOPC
30p
12.6%
23
Summer Institute '17 Contest 3 P4 - Customs
SIUCF
15
41.0%
23
DWITE '09 R2 #5 - Portals Redux
DWITE
12
39.7%
23
Mock CCO '18 Contest 3 Problem 2 - Roger Delegates Work to Jessica
Mock CCO
20p
28.9%
23
COCI '18 Contest 2 #2 Kocka
COCI
7p
33.3%
23
APIO '14 P3 - Beads and Wires
APIO
25p
24.0%
23
OCC '19 G5 - King kobortor's Infrastructure
Olympiads School
17p
24.7%
23
DMOPC '19 Contest 3 P5 - Festival
DMOPC
20
11.5%
23
PIB '20 P5 - 4D Matrices
Uncategorized
10p
39.8%
23
COCI '19 Contest 2 #2 Slagalica
COCI
10p
16.7%
23
NOI '97 P5 - Building Game
China NOI
15p
27.1%
23
NOI '08 P1 - Masquerade Party
China NOI
15p
9.1%
23
IOI '95 Practice Task 3 - Bar Codes
IOI
12p
35.4%
23
WC '18 Finals S3 - Screen Time
Woburn Challenge
15p
19.8%
23
DMOJ Capture The Flag '20 B2 - Strings
CTF
7
16.5%
23
COCI '11 Contest 6 #2 Prozori
COCI
5
67.6%
23
COCI '11 Contest 5 #4 Razbibriga
COCI
12p
34.7%
23
ECOO '21 P5 - Waldwick's Walk
ECOO
17p
21.6%
23
Monkey Motel
Uncategorized
12p
21.5%
23
Yet Another Contest 4 P6 - No More Solitaire
YAC
20p
6.6%
23
JOI '20 Open P3 - Power Plant
JOI
15p
39.8%
23
WOSS Dual Olympiad 2022 S3: Sightseeing in the North Pole
Seasonal
12
16.9%
23
Waterloo 2023 Winter A - So I'll Max Out My Constructive Algorithm Skills
Waterloo Local
5
32.9%
23
COCI '22 Contest 4 #3 Bojanje
COCI
17p
55.8%
23
Tree Journey
Olympiads School
12p
49.0%
23
Facebook Hacker Cup '15 Round 2 P3 - Autocomplete Strikes Back
FHC
20
49.0%
22
CSPC '15 #4 - Reading Logs
CSPC
5
11.5%
22
Executable Format
Uncategorized
10
28.3%
22
DMOPC '14 Contest 5 P5 - Attack on Anti-Spiral
DMOPC
25p
16.7%
22
DMPG '15 B6 - Bad S'mores
DMOPC
10p
5.9%
22
DMOPC '15 Contest 3 P6 - Gala
DMOPC
30p
11.3%
22
GFSSOC '15 Winter J4 - Christmas Music
GFSSOC
5p
13.2%
22
GFSSOC '15 Winter S5 - ORBOT
GFSSOC
15p
17.7%
22
CCCJQR P5
Seasonal
15p
21.0%
22
TLE '16 Contest 1 P6 - A Very Normal Test
TLE
25p
19.6%
22
HCI '16 - Cheese
Uncategorized
5p
38.7%
22
COCI '17 Contest 4 #3 Automobil
COCI
7p
10.6%
22
Greater New York Regional 2012 - Mystery
ICPC
5
46.9%
22
Mock CCO '18 Contest 2 Problem 4 - Victor's Rectangles
Mock CCO
20p
21.9%
22
DMPG '18 S6 - Mimi and Carrots
DMOPC
17p
24.0%
22
UTS Open '18 P6 - Subset Sum
Uncategorized
25p
16.1%
22
TLE 2018-19 P1 - Hello, World!
Seasonal
20p
5.3%
22
COCI '18 Contest 2 #4 Maja
COCI
15p
22.0%
22
ECOO '19 R2 P2 - Pizza
ECOO
10p
23.9%
22
CCO '09 P1 - Invasion of the Boxes
CCO
20p
12.8%
22
CCO '02 P1 - Spam
CCO
12
49.1%
22
CEOI '16 P4 - Match
CEOI
15p
19.9%
22
DMOPC '19 Contest 2 P6 - Two Roots
DMOPC
20p
11.8%
22
Brazilian IOI TST '19 Day 1 - Secret Santa
Brazil OI
17p
20.5%
22
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