class Solution {
    public int matchPlayersAndTrainers(int[] players, int[] trainers) {
        // 2 5 8 8
        //   4 7 9
        Arrays.sort(players);
        Arrays.sort(trainers);

        int m = 0;
        int n = 0;
        int res = 0;
        while (m < players.length && n < trainers.length) {
            if (players[m] <= trainers[n]) {
                res++;
                m++;
            } 
            n++;
        }
        return res;
    }
}