添加 16 题

leetcode/0999.Available-Captures-for-Rook/999. Available Captures for Rook.go

@@ -0,0 +1,27 @@
+package leetcode
+
+func numRookCaptures(board [][]byte) int {
+	num := 0
+	for i := 0; i < len(board); i++ {
+		for j := 0; j < len(board[i]); j++ {
+			if board[i][j] == 'R' {
+				num += caputure(board, i-1, j, -1, 0) // Up
+				num += caputure(board, i+1, j, 1, 0)  // Down
+				num += caputure(board, i, j-1, 0, -1) // Left
+				num += caputure(board, i, j+1, 0, 1)  // Right
+			}
+		}
+	}
+	return num
+}
+
+func caputure(board [][]byte, x, y int, bx, by int) int {
+	for x >= 0 && x < len(board) && y >= 0 && y < len(board[x]) && board[x][y] != 'B' {
+		if board[x][y] == 'p' {
+			return 1
+		}
+		x += bx
+		y += by
+	}
+	return 0
+}