Active Challenges
This table shows the most active challenges. The number of entries is taken as the number of submissions, passed or failed, for all users in the past week.
- Saving Time
- A Byte In Time Saves Nine
- ↪ 60 entries in the last seven days.
- Home On The Range
- It's as simple as "1 2 3 5 6 8" => "1-3, 5-6, 8."
- ↪ 59 entries in the last seven days.
- Brainfuck
- And you thought Perl looks like line noise ...
- ↪ 52 entries in the last seven days.
- Oblongular Number Spirals
- Oblongular *is* a word ...
- ↪ 49 entries in the last seven days.
- Prime Factors
- Work out the prime factors of a given number.
- ↪ 32 entries in the last seven days.
- Calendar
- Why buy calendars, when you can make your own?
- ↪ 31 entries in the last seven days.
- Roman to Decimal
- Lazy Cows Don't Moo.
- ↪ 25 entries in the last seven days.
- Choose
- What language will you choose?
- ↪ 21 entries in the last seven days.
- SHA-256 Hashing
- Implement the SHA-256 Hashing Algorithm.
- ↪ 20 entries in the last seven days.
- Seven-Segment Displays
- Represent numbers on a seven-segment display.
- ↪ 16 entries in the last seven days.
- Bob Ross' The Joy of ASCII Art
- Forget mountains, the future is ASCII Art.
- ↪ 15 entries in the last seven days.
- Vigenere Cipher
- Or should that be the Belaso Cipher?
- ↪ 14 entries in the last seven days.
- 99 Bottles Of Beer
- Does your code sing?
- ↪ 12 entries in the last seven days.
- Reverse
- Let's play a game ...
- ↪ 10 entries in the last seven days.
- Crossword
- Only drawing them, not solving them ... yet!
- ↪ 9 entries in the last seven days.
- Tower of Hanoi
- To recurse, or not to recurse, that is the question.
- ↪ 9 entries in the last seven days.
- Polynomial Division
- Because algebra is fun!
- ↪ 7 entries in the last seven days.
- Grid Computing
- We're Back!
- ↪ 7 entries in the last seven days.
- Numeric Diamonds
- Make some pretty diamonds for us.
- ↪ 4 entries in the last seven days.
- Switchboard
- Can you sort out the mess?
- ↪ 4 entries in the last seven days.
- Musical Score
- Teach your computer to read music.
- ↪ 4 entries in the last seven days.
- Pascal's Triangle
- Not-very-geometric arrangement of the binomial coefficients in a sort-of-triangle.
- ↪ 2 entries in the last seven days.
- Total Triangles
- Find the best scoring path through the triangle.
- ↪ 2 entries in the last seven days.