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

public class Main {
	static Scanner sc = new Scanner(System.in);

	public static void main(String[] args) {
		int N = sc.nextInt();
		int[] A = new int[N];
		for (int i = 0; i < N; ++i) {
			A[i] = sc.nextInt();
		}
		ArrayList<Integer> q = new ArrayList<>();
		for (int i = 0; i < N; ++i) {
			int idx = -1;
			int min = 999;
			for (int j = i; j < N; ++j) {
				if (A[j] < min) {
					min = A[j];
					idx = j;
				}
			}
			if (idx != i) {
				q.add((idx << 16) + i);
				A[idx] = A[i];
				A[i] = min;
			}
		}
		System.out.println(q.size());
		for (int v : q) {
			System.out.println((v >> 16) + " " + (v & 0xFFFF));
		}
		System.out.flush();
		sc.next();
	}

}