stack.yaml

# This file was automatically generated by 'stack init'
#
# Some commonly used options have been documented as comments in this file.
# For advanced use and comprehensive documentation of the format, please see:
# https://docs.haskellstack.org/en/stable/yaml_configuration/

# Resolver to choose a 'specific' stackage snapshot or a compiler version.
# A snapshot resolver dictates the compiler version and the set of packages
# to be used for project dependencies. For example:
#
# resolver: lts-21.13
# resolver: nightly-2023-09-24
# resolver: ghc-9.6.2
#
# The location of a snapshot can be provided as a file or url. Stack assumes
# a snapshot provided as a file might change, whereas a url resource does not.
#
# resolver: ./custom-snapshot.yaml
# resolver: https://example.com/snapshots/2023-01-01.yaml
resolver:
  url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/21/19.yaml

# User packages to be built.
# Various formats can be used as shown in the example below.
#
# packages:
# - some-directory
# - https://example.com/foo/bar/baz-0.0.2.tar.gz
#   subdirs:
#   - auto-update
#   - wai
packages: []
# Dependency packages to be pulled from upstream that are not in the resolver.
# These entries can reference officially published versions as well as
# forks / in-progress versions pinned to a git hash. For example:
#
# extra-deps:
# - acme-missiles-0.3
# - git: https://github.com/commercialhaskell/stack.git
#   commit: e7b331f14bcffb8367cd58fbfc8b40ec7642100a
#
# extra-deps: []

# Override default flag values for local packages and extra-deps
# flags: {}

# Extra package databases containing global packages
# extra-package-dbs: []

# Control whether we use the GHC we find on the path
# system-ghc: true
#
# Require a specific version of Stack, using version ranges
# require-stack-version: -any # Default
# require-stack-version: ">=2.13"
#
# Override the architecture used by Stack, especially useful on Windows
# arch: i386
# arch: x86_64
#
# Extra directories used by Stack for building
# extra-include-dirs: [/path/to/dir]
# extra-lib-dirs: [/path/to/dir]
#
# Allow a newer minor version of GHC than the snapshot specifies
# compiler-check: newer-minor

templ4ojs.hs

{-# LANGUAGE FlexibleInstances #-}
{-# LANGUAGE BangPatterns #-}
{-# LANGUAGE ScopedTypeVariables #-}
module Main where

import qualified Data.ByteString.Char8 as B
import Data.Maybe ( fromJust )
import Data.Array
import Data.List

main :: IO ()
main = B.interact (encode . solve . decode)

solve :: [[Int]] -> [[Int]]
solve dss = case dss of
    _ -> undefined

--

class InterfaceForOJS a where
    readB :: B.ByteString -> a
    readBs :: B.ByteString -> [a]
    readBs = map readB . B.words
    decode :: B.ByteString -> [[a]]
    decode = map readBs . B.lines

    showB :: a -> B.ByteString
    showBs :: [a] -> B.ByteString
    showBs = B.unwords . map showB
    encode :: [[a]] -> B.ByteString
    encode = B.unlines . map showBs

instance InterfaceForOJS B.ByteString where
    readB = id
    readBs = B.words
    showB = id
    showBs = B.unwords

instance InterfaceForOJS Int where
    readB = readInt
    showB = showInt

instance InterfaceForOJS String where
    readB = readStr
    showB = showStr

instance InterfaceForOJS Double where
    readB = readDbl
    showB = showDbl

instance InterfaceForOJS Char where
    readB = B.head
    showB = B.singleton
    readBs = B.unpack
    showBs = B.pack

readInt :: B.ByteString -> Int
readInt = fst . fromJust . B.readInt

showInt :: Int -> B.ByteString
showInt = B.pack . show

readStr :: B.ByteString -> String
readStr = B.unpack

showStr :: String -> B.ByteString
showStr = B.pack

readDbl :: B.ByteString -> Double
readDbl = read . B.unpack

showDbl :: Double -> B.ByteString
showDbl = B.pack . show