由新闻引出的计算概率方法题

    public static void main(String[] args) {
        int rc = 1000000;
        int mc = 0;
        for (int i = 0; i < rc; i++) {
            List<Integer> ai = genRank();
            int ri = isMatch(ai);
            if (ri > 0) {
                mc ++;
//                System.out.println(ai);
//                System.out.println(ri);
            }
        }
        System.out.println(mc);
    }

    public static List<Integer> genRank() {
        Set<Integer> ai = new HashSet<Integer>();
        Random r = new Random();
        while (ai.size() < 203) {
            ai.add(r.nextInt(786) + 1);
        }
        List<Integer> ri = new ArrayList<Integer>();
        ri.addAll(ai);
        Collections.sort(ri);
        return ri;
    }

    public static int isMatch(List<Integer> ai) {
        for (int i = 0; i < ai.size() - 4; i ++) {
            int ac = ai.get(i) + ai.get(i+1) + ai.get(i+2) + ai.get(i+3) + ai.get(i+4);
            if (ac == ai.get(i) * 5 + 10) {
                return ai.get(i);
            }
        }
        return 0;
    }