sample code

package com.box.data.platform.server.controller.biquery.table;

/**
 *
 */
public class TEST {
	public static void main(String[] args) {
		String s = "1B 2F 3C";
		
		int N = 10;
		
		int[][] array = new int[N][10];
		String[] seats = s.split("");
				
		for (String seat: seats) {
			int row = seat.charAt(0);
			int col = seat.charAt(1);
			array[row][col] = 1;
		}

		System.out.println(arrangeFamily(array));
	}
	
	public static int arrangeFamily(int[][] array) {
		int familyCount = 0;
		for (int i=0;i<array.length;i++) {
			int counter =0;
			for (int j=1;j<array[0].length-1;j++) {
				if (array[i][j] == 1) {
					counter =0;
				}
				
				//family have to sit together
				if (j==3 && counter == 0) {
					continue;
				}
				
				if (counter == 4) {
					familyCount++;
				}
			}
		}
		return familyCount;
	}
}