백준 7795

package baekjoon.이분탐색;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Arrays;
import java.util.StringTokenizer;

public class Main7795 {

   static int N, M;
   static int[] A, B;

   static int go(int[] B, int left, int right, int value) {
      int result = left - 1;
      while (left <= right) {
         int mid = (left + right) / 2;
         if (B[mid] < value) {
            result = mid;
            left = mid + 1;
         } else if (B[mid] >= value) {
            right = mid - 1;
         }
      }
      return result;
   }

   public static void main(String[] args) throws Exception {
      BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
      int T = Integer.parseInt(br.readLine());
      StringTokenizer st;
      while (T-- > 0) {
         input(br);
         int ans = 0;
         for (int i = 1; i <= N; i++) {
            ans += go(B, 1, M, A[i]);
         }
         System.out.println(ans);
      }
   }

   private static void input(BufferedReader br) throws IOException {
      StringTokenizer st;
      st = new StringTokenizer(br.readLine());
      N = Integer.parseInt(st.nextToken());
      M = Integer.parseInt(st.nextToken());
      A = new int[N + 1];
      B = new int[M + 1];
      st = new StringTokenizer(br.readLine());
      for (int i = 1; i <= N; i++) {
         A[i] = Integer.parseInt(st.nextToken());
      }
      st = new StringTokenizer(br.readLine());
      for (int i = 1; i <= M; i++) {
         B[i] = Integer.parseInt(st.nextToken());
      }
      Arrays.sort(B, 1, M + 1);
   }

}