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Random
Hot problems
WC '17 Contest 3 J3 - Uncrackable
IOI '94 P1 - The Triangle
DMOPC '19 Contest 5 P1 - Conspicuous Cryptic Checklist
CCC '24 S2 - Heavy-Light Composition
DMOPC '18 Contest 1 P2 - Sorting
Triple Fat Ladies
CCC '00 J1 - Calendar
Problem
Category ▴
Points
AC %
Users
COCI '23 Contest 3 #1 Eurokod
COCI
5p
59.4%
38
COCI '23 Contest 3 #2 Vrsar
COCI
10p
13.3%
22
COCI '23 Contest 3 #3 Milano C.le
COCI
10p
36.1%
28
COCI '23 Contest 3 #4 Restorani
COCI
20p
9.6%
5
COCI '23 Contest 3 #5 Slučajna Cesta
COCI
15p
36.5%
17
COCI '23 Contest 4 #1 Bingo
COCI
5p
67.0%
65
COCI '23 Contest 4 #2 Knjige
COCI
7p
23.1%
40
COCI '23 Contest 4 #3 Lepeze
COCI
25p
9.1%
5
COCI '23 Contest 4 #4 Putovanje
COCI
20p
10.7%
19
COCI '23 Contest 4 #5 Roboti
COCI
17p
7.5%
7
COCI '23 Contest 5 #1 Zlagalica
COCI
5p
52.5%
28
COCI '23 Contest 5 #2 Bitovi
COCI
10p
10.7%
12
COCI '23 Contest 5 #3 Piratski Kod
COCI
15p
44.8%
11
COCI '23 Contest 5 #4 Rolete
COCI
15p
28.8%
17
COCI '23 Contest 5 #5 Trokut
COCI
17p
28.1%
8
CSPC '15 #1 - The Card Game
CSPC
3
16.6%
163
CSPC '15 #2 - Build Season
CSPC
3
40.1%
155
CSPC '15 #3 - Spell Check
CSPC
7
27.9%
81
CSPC '15 #4 - Reading Logs
CSPC
5
11.5%
22
CSPC '15 #5 - Averages
CSPC
5
18.0%
46
CSPC '15 #6 - Attendance
CSPC
7p
41.4%
31
JSB '19 - P1
CTF
5
8.4%
27
JSB '19 - P2
CTF
7
26.7%
16
JSB '19 - P3
CTF
7
38.8%
15
JSB '19 - P4
CTF
17
23.0%
9
JSB '19 - P5
CTF
15
19.2%
9
DMOJ Capture The Flag '20 G1 - Sanity Check
CTF
3
68.0%
338
DMOJ Capture The Flag '20 G2 - Where's the flag?
CTF
3
27.5%
223
DMOJ Capture The Flag '20 G3 - Git Gud
CTF
5
24.2%
45
DMOJ Capture The Flag '20 G4 - All the folders in the world
CTF
7
14.0%
9
DMOJ Capture The Flag '20 F1 - RGB
CTF
3
63.5%
142
DMOJ Capture The Flag '20 F2 - Queries & Strings
CTF
5
66.3%
50
DMOJ Capture The Flag '20 F4 - Wire on Shark
CTF
10
38.1%
7
DMOJ Capture The Flag '20 F3 - Four Taps
CTF
7
44.2%
22
DMOJ Capture The Flag '20 C1 - All the bases!
CTF
3
61.0%
104
DMOJ Capture The Flag '20 C2 - Small RSA
CTF
5
39.1%
83
DMOJ Capture The Flag '20 C3 - Small AES
CTF
7
71.0%
21
DMOJ Capture The Flag '20 C4 - Larger Encryption
CTF
10
61.5%
8
DMOJ Capture The Flag '20 R1 - Classic Java
CTF
5
69.2%
25
DMOJ Capture The Flag '20 R2 - EZ Assembly
CTF
7
53.3%
21
DMOJ Capture The Flag '20 R3 - Harder Assembly
CTF
7
29.4%
14
DMOJ Capture The Flag '20 R4 - Python Cycles
CTF
12
41.9%
13
DMOJ Capture The Flag '20 B1 - Super Secure Pseudorandom Number Generator
CTF
5
16.9%
49
DMOJ Capture The Flag '20 B2 - Strings
CTF
7
16.5%
23
DMOJ Capture The Flag '20 B3 - Classic Buffer Overflow
CTF
7
10.7%
25
DMOPC '14 Contest 1 P5 - Surprise Teleport
DMOPC
7p
20.6%
531
DMOPC '14 Contest 1 P6 - Biology Homework
DMOPC
17p
18.7%
33
DMOPC '14 Contest 1 P1 - Median Mark
DMOPC
5p
20.3%
653
DMOPC '14 Contest 1 P2 - Tiles
DMOPC
3p
54.2%
1270
DMOPC '14 Contest 1 P3 - New Students
DMOPC
3p
37.6%
873
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