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Hot problems
CCC '19 S2 - Pretty Average Primes
Educational DP Contest AtCoder K - Stones
CCC '24 S2 - Heavy-Light Composition
IOI '94 P1 - The Triangle
APIO '10 P2 - Patrol
CCC '17 J4 - Favourite Times
UHCC1 P2 - String
Problem
Category
Points
AC %
Users ▴
MMM '14 B - Benergy Transfer
Uncategorized
10
40.5%
25
WC '15 Finals S4 - Server Hacking
Woburn Challenge
20p
26.8%
25
WC '99 Suicidal P1 - World
Woburn Challenge
17p
16.6%
25
WC '15 Contest 3 J3 - Red Sun Simulator
Woburn Challenge
10p
9.6%
25
WC '16 Contest 4 S1 - Parking Duty
Woburn Challenge
10p
19.3%
25
DMOJ Capture The Flag '20 R1 - Classic Java
CTF
5
69.2%
25
DMOJ Capture The Flag '20 B3 - Classic Buffer Overflow
CTF
7
10.7%
25
Baltic OI '16 P4 - Cities
Baltic OI
15p
32.1%
25
IOI '16 P2 - Roller Coaster Railroad (Standard I/O)
IOI
35p
12.5%
25
COCI '11 Contest 2 #4 KompičI
COCI
7p
15.6%
25
COCI '11 Contest 3 #4 Robot
COCI
7
39.7%
25
COCI '11 Contest 4 #4 Ograda
COCI
10p
24.5%
25
COCI '13 Contest 4 #4 Guma
COCI
12p
32.6%
25
COCI '17 Contest 7 #2 Timovi
COCI
7p
40.8%
25
COCI '11 Contest 5 #6 Popločavanje
COCI
25p
23.0%
25
BSSPC '21 S4 - Child Prodigy Chadstin
Uncategorized
17p
6.7%
25
Special Relativity
Uncategorized
10p
8.0%
25
NOI '21 P1 - Light Heavy Edges
China NOI
25p
8.7%
25
April Fools' Day Contest 1 P8 - NP-Hard
Uncategorized
0
5.7%
25
DMOPC '21 Contest 9 P5 - Chika Circle
DMOPC
20p
11.7%
25
BPC 1 S3 - Bus Stops
Uncategorized
17p
12.9%
25
Yet Another Contest 4 P5 - Signpost
YAC
20p
19.5%
25
NOIP '99 P2 - Palindrome Numbers
China NOI
7p
14.1%
25
Yet Another Contest 6 P5 - No More Coyotes
YAC
15p
22.5%
25
CEOI '22 P3 - Prize
CEOI
25p
6.5%
25
IOI '22 P2 - Prisoner Challenge
IOI
25p
8.2%
25
Baltic OI '01 P1 - Postman
Baltic OI
10p
18.7%
25
IOI '22 P4 - Digital Circuit
IOI
25p
25.2%
25
Cheerio Contest 2 P2 - Cereal Boxes
Uncategorized
3
13.0%
25
NOIP '08 P2 - Expression by Matches
China NOI
10p
52.5%
25
Wesley's Anger Contest Reject 1 - Stupendous Bowties 2
WAC
17
15.5%
25
STNBD P5 - Fianna Ray Ordesia
Uncategorized
10p
12.0%
26
New Year's '15 P6 - Tiles
Seasonal
20p
23.8%
26
UTS Open '15 #2 - Secret Code
Uncategorized
10p
17.1%
26
Linked List
Uncategorized
20p
6.9%
26
DMOPC '16 Contest 2 P6 - Console Simulator 2017
DMOPC
12p
12.0%
26
ICPC ECNA 2016 E - Red Rover
ICPC
7
49.0%
26
TLE '16 Contest 5 P2 - Playing Piano
TLE
10p
15.6%
26
TLE '16 Contest 6 (Mock CCC) S5 - Toll Routes
TLE
20p
3.9%
26
ECOO '17 R2 P3 - Lunch Time
ECOO
12p
16.0%
26
ECOO '14 R3 P3 - Future City
ECOO
10p
26.9%
26
TLE '17 Contest 1 P5 - Cake
TLE
15p
15.0%
26
DWITE '09 R5 #5 - Weak Passwords
DWITE
5
38.5%
26
DWITE '08 R3 #5 - Now in 3D
DWITE
7
78.7%
26
ICHB Selection Contest '17 Problem 2 - Black Star's Visit
Uncategorized
7p
8.5%
26
DMPG '18 G4 - Variation
DMOPC
15p
31.5%
26
JOI '18 Open P1 - Bubble Sort 2
JOI
20p
5.2%
26
Triway Cup '19 Summer B - Cameras
Seasonal
5
28.9%
26
Triway Cup '19 Summer E - Solar Power
Seasonal
5
21.1%
26
Another Contest 5 Problem 4 - Tudor Interacts With Poop
ACC
15p
16.1%
26
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