Top 20

1 0x00h 701 pts
2 boris39 701 pts
3 neoxquick 682 pts
4 maf-ia 663 pts
5 thefinder 644 pts
6 benito255 608 pts
7 mego 591 pts
8 madbat2 581 pts
9 Mart 554 pts
10 Stupefy 533 pts
11 nikokks 513 pts
12 tehron 504 pts
13 Kithyane 502 pts
14 plucth 480 pts
15 egosum 473 pts
16 CoYoTe99 416 pts
17 Undr 415 pts
18 Zeta 415 pts
19 loonies2 411 pts
20 Armavica 410 pts

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Shoutbox

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.

26 Feb - 5:54 pm

contest 22 is not concerned by the issue I found, and seems to be working (I suppose you don't have 500 error on this one ?). Your solutions are indeed rejected, but I did not check them yet

26 Feb - 3:25 pm

The validation for contest 22 also seems to be wrong (it's not accepting solutions that are clearly correct). I submitted bug report yesterday.

26 Feb - 9:59 am

Ok I fixed the issue It is higly possible that other challenges are impacted, so don't hesitate to tell meif you encounter this again. Thank you for reporting

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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) 9
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) 17

Multimedia

Name Points Validations (%)
WAV ? (6) 10
Image color (56) 11
Musical note (7) 14
Bar code I (39) 14
Puzzle (9) 17
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) 12
Maze (17) 12
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) 11

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) 16
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
Radar (58) 19
Pendulum ODE II (52) 19