分治算法－球队循环赛日程安排－java实现

  
/**
 * 分治法－球队循环赛事日程安排，球队数量最好是2的n次方，不然日程安排会出现空隙
 * 采用分治法进行处理，将日程安排分成四个象限来处理
 */
public class RoundMatch {
	public void roundMatch(int[][] table, int n) {
		if (n == 1) {
			table[0][0] = 1;
			return;
		}
		int m = n / 2;
		// 先填充左上区域
		roundMatch(table, m);
		// 右上区域
		for (int i = 0; i < m; i++) {
			for (int j = m; j < n; j++) {
				table[i][j] = table[i][j - m] + m;
			}
		}
		// 左下区域
		for (int i = m; i < n; i++) {
			for (int j = 0; j < m; j++) {
				table[i][j] = table[i - m][j] + m;
			}
		}
		// 右下区域
		for (int i = m; i < n; i++) {
			for (int j = m; j < n; j++) {
				table[i][j] = table[i - m][j - m];
			}
		}
	}
	public static void main(String[] args) {
		RoundMatch roundMatch = new RoundMatch();
		int size = 8;
		int[][] table = new int[size][size];
		roundMatch.roundMatch(table, size);
		for (int i = 0; i < size; i++) {
			for (int j = 0; j < size; j++) {
				System.out.print(table[i][j] + " ");
			}
			System.out.println();
		}
	}
}