Node.js) 백준: Best Grass

https://www.acmicpc.net/problem/6186

6186번: Best Grass

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

const [R, C] = n.split(' ').map(v => +v);
const board = arr.map(v => [...v.split(''), '.'])
board.push(new Array(C + 1).fill('.'));
let cnt = 0;
for (let i = 0; i < R; i++) {
  for (let j = 0; j < C; j++) {
    if (board[i][j] == '#') {
      cnt++;
      if (board[i + 1][j] == '#') {
        board[i + 1][j] = '.'
      }
      if (board[i][j + 1] == '#') {
        board[i][j + 1] = '.'
      }

    }
  }
}
console.log(cnt)