I'm using Haskell and all of my submissions are always above 11300kb memory, I tried to submit older solution in Haskell for the same problems (for comparison), mostly submitted a year ago, with less memory not even exceeding the common C++17 memory usage, but they end up using 11300kb or above, so my question is how to reduce the memory usage, and what are the used compiler options/flags, I've read the About the programming languages page for information, but it contains old information mentioning GHC 7.6.1.