import java.util.*;

public class Main {
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    int n, m, x;
    n = sc.nextInt();
    m = sc.nextInt();
    x = sc.nextInt();

    int start = 0;
    int fin = 0;
    for (int i = 0; i < m; i++) {
      int num = sc.nextInt();
      if (num < x) {
        start++;
      } else if (num > x) {
        fin++;
      }
    }
    System.out.println(Math.min(start, fin));
  }
}

/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz