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codingame/code_royal/src/Main.purs
weiss 3e8a95a6b1 - wood 1
- avoid
- build archers and knights
2020-04-10 05:24:09 +02:00

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module Main where
import Prelude
import Control.MonadZero (guard)
import Data.Array (any, filter, foldl, head, length, reverse, sortBy, (!!))
import Data.Maybe (Maybe(..), fromJust)
import Effect (Effect)
import Effect.Console (log, error)
import Effect.Random (randomInt)
import GameInput (Minion, Site, SiteInfo, ProtoSite, parseInitInput, parseInput)
import Lib (dist)
import Partial.Unsafe (unsafePartial)
main :: Effect Unit
main = do
initInput <- parseInitInput
error $ show initInput
loop initInput.numSites initInput.sites
loop :: Int -> Array SiteInfo -> Effect Unit
loop numSites siteInfo = do
input <- parseInput numSites
let touchedSite = if input.touchedSite == -1
then Nothing
else Just input.touchedSite
loop' numSites input.gold touchedSite (combinedSites input.sites) input.units
where
-- combine sites with siteInfo
combinedSites :: Array ProtoSite -> Array Site
combinedSites sites = do
protoS <- sites
infoS <- siteInfo
guard $ protoS.id == infoS.id
pure { id: protoS.id
, structureType: protoS.structureType
, owner: protoS.owner
, param1: protoS.param1
, param2: protoS.param2
, x: infoS.x
, y: infoS.y
, radius: infoS.radius
}
loop' :: Int -> Int -> Maybe Int -> Array Site -> Array Minion -> Effect Unit
loop' numSites gold touchedSite sites units = do
-- error $ "Free sites: " <> (show $ map (\s -> s.id) freeSites)
-- error $ "Near sites: " <> (show $ map (\s -> s.id) nearSites)
if (length $ friendlySites sites) > 3
then log avoid
else case head $ nearSites queen sites of
Just sInfo -> do
let typ = if hasKnightsBarrack sites then 1 else 0
log $ build sInfo typ
Nothing -> do
log avoid
t <- trainAll gold sites
log $ t
loop numSites (toSiteInfo <$> sites)
where
avoid :: String
avoid = case nearestEnemy of
Just enemy -> "MOVE " <> show (site enemy).x <> " " <> show (site enemy).y
Nothing -> "MOVE 0 0"
where site enemy = unsafePartial $ fromJust $ head $
sortBy (\s1 s2 -> compare (dist enemy s2) (dist enemy s1)) (friendlySites sites)
queen :: Minion
queen = unsafePartial $ fromJust $ head $ filter (\u -> u.unitType == -1 && u.owner == 0) units
enemyQueen :: Minion
enemyQueen = unsafePartial $ fromJust $ head $ filter (\u -> u.unitType == -1 && u.owner == 1) units
-- nearest non-queen enemy
nearestEnemy :: Maybe Minion
nearestEnemy = head $ filter (\u -> u.unitType /= -1 && isEnemy u) units
-- TODO: make pure
trainAll :: Int -> Array Site -> Effect String
trainAll gold sites = do
randBarrack <- randomBarrack
choose <- randomInt 1 100
let barrack = if gold > 100 && choose < 23 then knightBarrack else randBarrack
pure $ foldl siteToIds "TRAIN" barrack
where
siteToIds acc site = acc <> " " <> show site.id
knightBarrack = case head $ knightBarracks sites of
Just barrack -> [barrack]
Nothing -> []
randomBarrack = do
let ownBarracks = filter isOwn $ barracks sites
rand <- randomInt 0 $ length ownBarracks
case ownBarracks !! rand of
Just barrack -> pure [barrack]
Nothing -> pure []
freeSites :: Array Site -> Array Site
freeSites = filter (\s -> s.owner == -1)
friendlySites :: Array Site -> Array Site
friendlySites = filter (\s -> s.owner == 0)
nearSites :: Minion -> Array Site -> Array Site
nearSites unit sites = sortBy (compareSiteInfoDist unit) (freeSites sites)
hasKnightsBarrack :: Array Site -> Boolean
hasKnightsBarrack sites = any (\s -> s.param2 == 0) (friendlySites sites)
knightBarracks :: Array Site -> Array Site
knightBarracks sites = filter (\s -> s.param2 == 0) (friendlySites sites)
toSiteInfo :: Site -> SiteInfo
toSiteInfo s = { id: s.id, x: s.x, y: s.y, radius: s.radius }
compareSiteInfoDist :: Minion -> Site -> Site -> Ordering
compareSiteInfoDist u s1 s2 = compare (dist s1 u) (dist s2 u)
build :: forall e. { id :: Int | e } -> Int -> String
build s typ = "BUILD " <> show s.id <> " BARRACKS-" <> t
where t = if typ == 0 then "KNIGHT" else "ARCHER"
isOwn :: forall a. { owner :: Int | a } -> Boolean
isOwn = owner 0
isEnemy :: forall a. { owner :: Int | a } -> Boolean
isEnemy = owner 1
owner :: Int -> forall a. { owner :: Int | a } -> Boolean
owner oId r = r.owner == oId
barracks :: Array Site -> Array Site
barracks sites = filter (\b -> b.structureType == 2) sites
moveToPos :: forall e. { x :: Int, y :: Int | e } -> String
moveToPos p = "MOVE " <> show p.x <> " " <> show p.y
-- Phase 1
-- Queen takes as much buildings as possible
-- Build Archers only
-- Phase 2
-- Queen destroys enemy buildings
-- Build Archers only
-- Phase 3
-- Queen avoids Knights
-- All Buildings but one train Archers
-- nearestBuilding :: Pos