package no397;

import java.util.ArrayList;
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int[] a = new int[n];
		for(int i=0;i<n;i++) {
			a[i] = sc.nextInt();
		}
		ArrayList<Query> al = new ArrayList<>();
		for(int i=0;i<n;i++) {
			int min = 10000;
			int minj = -1;
			for(int j=i;j<n;j++) {
				if (a[j] < min) {
					min = a[j];
					minj = j;
				}
			}
			if (i != minj) {
				int temp = a[i];
				a[i] = a[minj];
				a[minj] = temp;
				al.add(new Query(i,minj));
			}
		}
		System.out.println(al.size());
		for(Query q:al) {
			System.out.println(q.i + " " + q.j);
		}
		sc.nextInt();
	}
	

}

class Query {
	int i,j;

	public Query(int i, int j) {
		super();
		this.i = i;
		this.j = j;
	}
	
}