Befunge Brain Teasers

7 solutions, 26 points

I'm typing this on my phone, because I don't have access to my computer currently. I actually had to work out Puzzle 6 by pen & paper.

Puzzle 1 (Score 3): 4f52d5b243

 1v
v:<      <
>.1+:56+-|
         @

This one is fairly straight forward. Get a 1 on the stack, then print-increment-compare-loop until 11 is hit.

Puzzle 2 (Score 3): 85226eba20

 "`"     v
v"z":,:+1<
>-       |
         @

Basically the same as the previous one, just with characters instead of numbers. Used a different IP route though.

Puzzle 3 (Score 5): 1ff5bcb1d9

  "!dlroW"v
    >,,,,  ,,v
    ,     "
    , ?      ,
          o
          l   
  ??,???  l   
    ,     e   
       ?  "  @
  ??^,"H" <
    ?  ?
????  ??
?  ??

Here I cheaped out a little bit. Push the string to the stack and print characters manually, navigating through the spaces. I had loads of extra room, so I just left most of the question marks in. Note the trailing spaces on rows 6 to 8, I didn't remove them when calculating the hash.

Puzzle 4 (Score 2): f8b7bdf741

"{".  @

Really simple, just get the character with the correct code and print as a number, with two free spaces.

Puzzle 5 (Score 5): c4db4b6af9

    v
  ??"??
#,_@e">>:
 <"B"<^
ung"<^"ef

This was a fun one to get right. May not work correctly on some interpreters due to wrapping strings & jumps, works on the linked one. Basically, the code pushes the output string and then enters the standard printing loop, wrapping on the sides.

Puzzle 6 (Score 5): 356e912eec

1        v
     #
     v??v_
      
     5
      75<^                              p15:-1g15,:*
     >5+:,"floG edoC dna selzzuP gnimmargorP ">:#,_@
     @

Now this was the "masterpiece". I actually took a piece of paper and spent some time on this. (Actually, I did some extra work by missing the space in the string when copying.) Note the trailing spaces on row 4, I didn't remove them when calculating the hash.

The code works by first pushing a one to enter the main loop. The loop uses the # on the second line as a counter, and both prints and pushes a # on every iteration. After that a newline is printed and pushed. Next, the given string is pushed. Finally, the code enters a printing loop, which prints everything on the stack in reverse, which means the string, then the newline, and finally the remaining #s.

Puzzle 7 (Score 3): 0881fc2619

"0"> :,1+v
   |-":":<
  @>"10",,

This is almost the same as Puzzle 2, but with a different route, different output characters, an additional 01 in the end and a quick wrap to finish it off.

4 solutions, 15 points

I hope I didn't mess up the trailing whitespace anywhere when generating the hashes.

Puzzle 1 (Score 3): de1de4c4c8

 v
v<       >
>1+:.:9`!|
         @

Puzzle 3 (Score 5): 071cad0879

  "!dlroW"v
    >,,,,  ,,v
    ,     "
    ,        ,
          o
          l
    ,     l
    ,     e
          "  @
    ^,"H" <

Puzzle 4 (Score 2): 531940bc43

"{".  @

Puzzle 5 (Score 5): 5bafaed8e9

    ^
  v >,,
n"<@,, ,"
 "e"^>,
uge"<^"Bf