using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Text;

class TEST{
	static void Main(){
		Sol mySol =new Sol();
		mySol.Solve();
	}
}

class Sol{
	public void Solve(){
		
		int[] B=new int[N];
		for(int i=0;i<N;i++){
			B[A[i]-1]=i+1;
		}
//Console.WriteLine(String.Join(" ",B));
		
		int[] C=Enumerable.Range(1,N).ToArray();
		for(int i=0;i<K;i++){
			int tmp=C[X[i]-1];C[X[i]-1]=C[Y[i]-1];C[Y[i]-1]=tmp;
		}
//Console.WriteLine(String.Join(" ",C));
		
		List<int> XX=new List<int>();
		for(int i=0;i<N;i++){
			if(C[i]==B[i])continue;
			int j=i;
			while(C[j]!=B[i])j++;
			j--;
			while(j>=i){
				XX.Add(j+1);
				var tt=C[j];C[j]=C[j+1];C[j+1]=tt;
				j--;
			}
		}
		
		Console.WriteLine(XX.Count);
		foreach(var x in XX)Console.WriteLine("{0} {1}",x,x+1);
		
	}
	int N,K;
	int[] X,Y;
	int[] A;
	public Sol(){
		N=ri();
		K=ri();
		X=new int[K];
		Y=new int[K];
		for(int i=0;i<K;i++){
			var d=ria();
			X[i]=d[0];
			Y[i]=d[1];
		}
		A=ria();
	}




	static String rs(){return Console.ReadLine();}
	static int ri(){return int.Parse(Console.ReadLine());}
	static long rl(){return long.Parse(Console.ReadLine());}
	static double rd(){return double.Parse(Console.ReadLine());}
	static String[] rsa(){return Console.ReadLine().Split(' ');}
	static int[] ria(){return Array.ConvertAll(Console.ReadLine().Split(' '),e=>int.Parse(e));}
	static long[] rla(){return Array.ConvertAll(Console.ReadLine().Split(' '),e=>long.Parse(e));}
	static double[] rda(){return Array.ConvertAll(Console.ReadLine().Split(' '),e=>double.Parse(e));}
}