Ramda.js使ってます

botchi_b_2002.js

const R = require('ramda');

process.stdin.resume();
process.stdin.setEncoding('utf8');

let lines = [];

let reader = require('readline').createInterface({
  input: process.stdin,
  output: process.stdout
});

reader.on('line', (line) => {
  lines.push(line);
});

reader.on('close', () => {
  console.log("\n")

  const sumTeamNumber = lines[0]
  const matchResult = lines.filter(x=>!(x>=0))

  //数字の削除 => 1文字ずつ分解&&配列化 => 余分な文字をまとめてからの文字列に => 要素のカウント
  const treatmentMatchResult = matchResult.filter(x=>x).map(x=>[...[]+x]).map(x=>x.map(y=>y.replace(' ','').replace('-',''))).map(x=>R.countBy(R.toLower)(x))
  const winPoints = {}
  const points = []

  //ここのカウンターくそダセェ
  let counter = 0;
  let teamCounter = 1

  //勝ち点カウント ~NaN対策を添えて~
  treatmentMatchResult.forEach(x=>{
    counter += (x['w']-[])*2 || 0
    counter += (x['d']-[]) || 0
    winPoints[teamCounter] = counter
    points.push(counter)
    counter = 0
    teamCounter ++
  })

  const winnerTeamsPoint = points.reduce((a,b)=>Math.max(a,b))

  const winnerTeam = Object.keys(winPoints).filter((key) => {
      return winPoints[key] === winnerTeamsPoint
  })

  //優勝チーム,勝ち点,勝ち,引き分け,負け,<= undefined対策
  console.log( 
    winnerTeam[0],winnerTeamsPoint,
    treatmentMatchResult[winnerTeam[0] -1]['w'] || 0,
    treatmentMatchResult[winnerTeam[0] -1]['d'] || 0,
    treatmentMatchResult[winnerTeam[0] -1]['l'] || 0
    ) 

});botchi_b_2002