import java.util.*;
import java.io.*;

public class Main {
    public static void main(String[] args) throws Exception {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        int n = Integer.parseInt(br.readLine());
        int kk = Integer.parseInt(br.readLine());
        int[] current = new int[n + 1];
        for (int i = 1; i <= n; i++) {
            current[i] = i;
        }
        for (int i = 0; i < kk; i++) {
            String[] line = br.readLine().split(" ", 2);
            int a = Integer.parseInt(line[0]);
            int tmp = current[a];
            current[a] = current[a + 1];
            current[a + 1] = tmp;
        }
        int[] goal = new int[n + 1];
        String[] last = br.readLine().split(" ", n);
        for (int i = 1; i <= n; i++) {
            goal[Integer.parseInt(last[i - 1])] = i;
        }
        int count = 0;
        StringBuilder sb = new StringBuilder();
        for (int i = 1; i < n; i++) {
            int right = i;
            while (current[right] != goal[i]) {
                right++;
            }
            for (int j = right; j - 1 >= i; j--) {
                count++;
                int tmp = current[j - 1];
                current[j - 1] = current[j];
                current[j] = tmp;
                sb.append(j - 1).append(" ").append(j).append("\n");
            }
        }
        System.out.println(count);
        System.out.print(sb);
    }
}