import java.util.Scanner;

class Main{
	public static void main(String[] args){
		Scanner stdIn = new Scanner(System.in);

		int n = stdIn.nextInt();
		int m = stdIn.nextInt();
		int x = stdIn.nextInt();
		int back = 0;
		int go = 0;
		int[] a = new int[m];
		int i;
		for(i = 0; i < m; i++){
			a[i] = stdIn.nextInt();
			if(a[i] < x)
				back++;
			if(x < a[i])
				go++;
                }
		if(back < go)
			System.out.println(back);
		else
			System.out.println(go);
        }
}
/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