Node.js) 백준 1018번 : 체스판 다시 칠하기

https://www.acmicpc.net/problem/1018

1018번: 체스판 다시 칠하기

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


const [x, y] = n.split(' ').map(v => +v);
const rightBoard = 'WBWBWBWBBWBWBWBW'.repeat(4);
const rightBoard2 = 'BWBWBWBWWBWBWBWB'.repeat(4);

let answer = 100;
for (let i = 0; i < x - 7; i++) {
  for (let j = 0; j < y - 7; j++) {
    const temp = arr[i].substr(j, 8)
      + arr[i + 1].substr(j, 8)
      + arr[i + 2].substr(j, 8)
      + arr[i + 3].substr(j, 8)
      + arr[i + 4].substr(j, 8)
      + arr[i + 5].substr(j, 8)
      + arr[i + 6].substr(j, 8)
      + arr[i + 7].substr(j, 8)
    let cnt1 = 0;
    let cnt2 = 0;
    for (let k = 0; k < 64; k++) {
      if (temp[k] != rightBoard[k]) cnt1++;
      if (temp[k] != rightBoard2[k]) cnt2++;
    }
    if (cnt1 < answer) answer = cnt1;
    if (cnt2 < answer) answer = cnt2;
  }

}
console.log(answer);