419. 甲板上的战舰

甲板上的战舰

• 难度: medium
• 原始链接: https://leetcode.cn/problems/battleships-in-a-board
• 标签: 脑筋急转弯

解法一: 脑筋急转弯

go

func countBattleships(board [][]byte) int {
  ans := 0
  rLen := len(board)
  cLen := len(board[0])
  for r := 0; r < rLen; r++ {
    for c := 0; c < cLen; c++ {
      if board[r][c] == 'X' &&
        (r == 0 || r > 0 && board[r-1][c] == '.') &&
        (c == 0 || c > 0 && board[r][c-1] == '.') {
        ans++
      }
    }
  }
  return ans
}