숫자게임

package programmers;

import java.util.Arrays;

public class 숫자게임 {
   public static int solution(int[] A, int[] B) {

      int answer = 0;
      Arrays.sort(A);
      Arrays.sort(B);
      int idx = B.length-1;
      for (int i = A.length - 1; i >= 0; i--) {
         if (A[i] < B[idx]) {
            idx--;
            answer++;
         }
      }

      return answer;
   }

   public static void main(String[] args) {
      System.out.println(solution(new int[] {5, 1, 3, 7}, new int[] {2, 2, 6, 8}));
      System.out.println(solution(new int[] {2, 2, 2, 2}, new int[] {1, 1, 1, 1}));
   }

}