import java.util.*;
public class Main{
	public static void main(String[] args){
    	Scanner sc = new Scanner(System.in);
      int n = sc.nextInt();
      int m = sc.nextInt();
      int x = sc.nextInt();
      int[] a = new int[m];
      for(int i = 0;i < m;i++)a[i] = sc.nextInt();
      int sum1 = 0;
      int sum2 = 0;
      int x1 = x;
      int x2 = x;
      for(int i = 0;i<m;i++){
      	if(a[i]<x)sum1++;
      }
      for(int i = 0;i < m;i++){
      	if(x<a[i])sum2++;
      }
      System.out.println(Math.min(sum1,sum2));
    }
}
/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