memGAP

memGAP is a language designed to be odd to work in. A surprise, I know.

How to write a program

Programs consists of md5 hashes, which are then brute forced to return individual commands. The following commands are available at your disposal:

• size - pops S; pushes the size of S.
• add - pops B then A; pushes A + B.
• neg - pops N; pushes -N.
• rep - pops N; pushes "1" repeated N times.
• swap - swaps the top two members of the stack.
• bub - pops N; rotates the top N members once to the left. (e.g. 1 2 3 4 4 bub becomes 2 3 4 1)
• char - pops N; pushes the character with charcode N.
• out - pops X; prints X.
• dup - duplicates the top element on the stack.
• pop - pops the top element of the stack.
• nil - pushes 0.
• len - pushes the number of elements in the stack.
• open - starts a loop while the top element is neither 0 nor the empty string.
• shut - closes that loop.
• ? - used for debugging in the program.
• in - pushes a string from STDIN
• # - inputs a number
• btwn - pops U then L then N; pushes L <= N <= U.
• get - pops N then A; pushes A, then pushes A[n].

All other commands are pushed verbatim to the stack.