Runtimes

Classical brain**** with as many byte-sized cells as there are bytes in the memory limit.

Gforth 0.7.2.

Submissions ran as gforth <source>.fs -e bye.

Node.js, with the standard library and the usual process.stdin / console.log. Unlike the V8 runtime beside it, a solution written here runs the same way on your own machine.

Objective-C with GNUstep Base 1.22.1 on GCC 4.7.2+.

This is a custom version of V8 that adds six functions in order to perform I/O and aid in online judging.

• print(...): similar to Python's print, prints all argument separated by space followed by new line.
• flush(): flushes stdout, ensuring everything output by print() immediately shows up.
• gets(): similar to the Ruby equivalent, returns one line of input from stdin.
• read(bytes): read bytes bytes from stdin as an ArrayBuffer.
• write(buffer): write a typed array, ArrayBuffer, or a view of ArrayBuffer to stdout.
• quit(code): exits the program with code.
• You can also assign to the global variable autoflush to control whether print() flushes.