Node.js) 백준 14397 번: 해변

https://www.acmicpc.net/problem/14397

14397번: 해변

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

const [R, C] = n.split(' ').map(v => +v);
let answer = 0;
const board = []

for (let i = 0; i < R; i++) {
  board.push([]);
  if (i % 2 == 1) board[i].push('*');
  for (let j = 0; j < C; j++) {
    board[i].push(arr[i][j])
    board[i].push(arr[i][j])
  }
}


for (let i = 0; i < R; i++) {
  for (let j = 0; j < board[i].length; j++) {
    if (board[i][j] == '#') {
      if (j > 0 && board[i][j - 1] == '.') {
        answer++;
      }
      if (j < board[i].length - 1 && board[i][j + 1] == '.') {
        answer++;
      }
      if (i > 0 && board[i - 1][j] == '.') {
        answer++;
      }
      if (i < R - 1 && board[i + 1][j] == '.') {
        answer++;
      }
    }
  }
}

console.log(answer)