Top 20

1 0x00h 697 pts
2 boris39 697 pts
3 neoxquick 678 pts
4 maf-ia 660 pts
5 thefinder 640 pts
6 benito255 605 pts
7 mego 589 pts
8 madbat2 580 pts
9 plucth 561 pts
10 Mart 551 pts
11 eax 550 pts
12 nikokks 546 pts
13 Stupefy 530 pts
14 tehron 503 pts
15 Kithyane 498 pts
16 egosum 471 pts
17 CoYoTe99 415 pts
18 Undr 413 pts
19 Zeta 413 pts
20 Armavica 408 pts

Full ranking

Shoutbox

25 May - 12:07 pm

NGXKGTFWPGODKPGPFQTOKIIVNCJCYVNIWIPVTIFQYDNCKVYPW

9 Apr - 2:10 pm

Yeah this email challenge is a pain in the ***. Sorry about that, we might even remove it in the future, i will see if we find time to fix it

2 Apr - 7:03 am

The Email challenge (#21) appears to be broken again. No mail is being received. Tried with multiple mail services to no avail.

12 May - 11:47 am

Working again now.

10 May - 4:05 pm

Hello, sorry for the late answer, in fact yes there is an issue with the mail, we will try to fix it quickly. Thanks for reporting

7 May - 6:07 pm

Hi there is a issue for the challenfe Email (number 21). I don't receive a mail on any of them: gmail, hotmail, yahoo. do i fail or is it the challenge ?

28 Feb - 10:35 am

Yes we fixed it

27 Feb - 10:00 pm

Thank you, just validated contest22. The solution checker seems to have been fixed.

27 Feb - 8:40 am

Yes several solutions are accepted of course. I will check one of your answers

26 Feb - 7:51 pm

No 500 error, but the solutions I'm submitting can be verified to be correct. It can't be that only one configuration is accepted, right? - as there are multiple correct configurations for each problem.

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Challenges by categoriesAll challenges

Cryptography

Name Points Validations (%)
Ave Caesar I (4) 4
Vigenère I (10) 7
Ave Caesar II (5) 8
base64 (50) 8
Vigenère II (11) 11
Chaotic cryptography I (29) 13
Chaotic cryptography II (32) 16
Chaotic cryptography III (35) 18
Homemade algorithm (54) 19

Mathematics

Name Points Validations (%)
Sum of two numbers (1) 1
What's the captain age ? (14) 2
Second order equation (2) 3
Timestamp (18) 6
Calculator I (19) 7
BMI & BFP (53) 9
Matrices (12) 10
Calculator II (24) 11
Polynomial regression (25) 14
Random walk (55) 16

Multimedia

Name Points Validations (%)
WAV ? (6) 10
Image color (56) 11
Musical note (7) 14
Bar code I (39) 14
Puzzle (9) 16
Blood image analysis (38) 18
Transmission of a digital signal (33) 18
Forms analysis (28) 19

AI

Name Points Validations (%)
Optical Character Recognition I (20) 11
Language detection (37) 11
Maze (17) 13
Formal Systems and Decision Procedures (49) 17
Chess game I (22) 17
Sliding puzzle (48) 17
Optical Character Recognition II (26) 18
Chess game II (41) 18
Person identification - Iris (36) 19

Network

Name Points Validations (%)
HTTP (15) 8
HTML Parsing (44) 10
Email (21) 12

Miscellaneous

Name Points Validations (%)
Do you know how to count ? (3) 6
Research in a string (16) 6
A sorting problem (13) 7
String manipulation I (42) 8
String manipulation II (43) 8
Data compression I (31) 8
Turing Machine I (45) 11
Tower of Hanoï (30) 15
Card Trick (46) 15
Strange function (57) 15
Data compression II (34) 17

Physics

Name Points Validations (%)
Ballistic (8) 10
Satellite geolocation (23) 17
Pendulum ODE I (51) 17
Geolocation without satellite (27) 18
Pendulum ODE II (52) 18
Radar (58) 19