Node.js) 백준 9375번 : 패션왕 신해빈

https://www.acmicpc.net/problem/9375

9375번: 패션왕 신해빈

const fs = require('fs');
const [n, ...arr] = fs.readFileSync("./dev/stdin").toString().trim().split("\n");


let clothes = [];
for (let i = 0; i < arr.length; i++) {
  if (arr[i].includes(' ')) {
    let temp = arr[i].split(' ');
    clothes[clothes.length - 1].push(temp)
  } else {
    clothes.push([])
  }
}

clothes.forEach(arr => {
  let cloth = {};
  arr.forEach(v => {
    if (cloth.hasOwnProperty(v[1])) {
      cloth[v[1]]++;
    } else {
      cloth[v[1]] = 1;
    }
  })
  let clothArr = Object.entries(cloth);
  if (clothArr.length == 1) {
    console.log(clothArr[0][1]);
  }
  else {
    console.log(clothArr.reduce((r, v) => { return r * (v[1] + 1) }, 1) - 1)
  }
})