输出比赛匹配对

/*
 * 思路：
 * 1. 使用Java Stream来简化代码。
 * 2. 每轮比赛通过Stream进行配对，生成匹配对列表。
 * 3. 胜者进入下一轮，直至决出冠军。
 */
 
import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;
import java.util.stream.IntStream;
 
public class MatchOutputStream {
    public List<List<String>> findContestMatch(int[] teams) {
        List<String> currentRound = Arrays.stream(teams)
                                          .mapToObj(String::valueOf)
                                          .collect(Collectors.toList());
        List<List<String>> result = new ArrayList<>();
        while (currentRound.size() > 1) {
            List<String> pairs = IntStream.range(0, currentRound.size() / 2)
                                          .mapToObj(i -> "(" + currentRound.get(i) + "," + currentRound.get(currentRound.size() - 1 - i) + ")")
                                          .collect(Collectors.toList());
            result.add(pairs);
            currentRound = pairs;
        }
        return result;
    }
 
    public static void main(String[] args) {
        MatchOutputStream mo = new MatchOutputStream();
        int[] teams = {1, 2, 3, 4, 5, 6, 7, 8};
        List<List<String>> matches = mo.findContestMatch(teams);
        for (List<String> round : matches) {
            System.out.println(round);
        }
    }
}