using System;
using System.Collections.Generic;

namespace No326_1{
    public class Program{//(T T)
        public static void Main(string[] args){
            var n = int.Parse(Console.ReadLine());
            var k = int.Parse(Console.ReadLine());

            var xn = new int[k];
            for(var i = 0; i < k; i++) xn[i] = int.Parse(Console.ReadLine().Split(' ')[0]);

            var seq = Array.ConvertAll(Console.ReadLine().Split(' '), int.Parse);

            foreach(var x in xn){
                var tmp = seq[x];
                seq[x] = seq[x - 1];
                seq[x - 1] = tmp;
            }

            var resultList = new List<int>();
            for(var i = 1; i < n; i++){
                for(var j = 1; j < n - i + 1; j++){
                    if(seq[j] < seq[j - 1]){
                        var tmp = seq[j];
                        seq[j] = seq[j - 1];
                        seq[j - 1] = tmp;
                        resultList.Add(j);
                    }
                }
            }

            Console.WriteLine(resultList.Count);
            resultList.ForEach(i => Console.WriteLine($"{i} {i + 1}"));
            Console.ReadLine();
        }
    }
}