import java.util.Scanner;

public class Test {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		int n = sc.nextInt(), max, idx = 0, tmp;
		int[] m = new int[n];
		int[][] ans = new int[n][2];
		for (int i = 0; i < n; i++) {
			m[i] = sc.nextInt();
		}
		for (int i = 0; i < n - 1; i++) {
			max = i;
			for (int j = i + 1; j < n; j++) {
				if (m[max] < m[j]) {
					max = j;
				}
			}
			if (i != max) {
				ans[idx][0] = i;
				ans[idx][1] = max;
				idx++;
				tmp = m[i];
				m[i] = m[max];
				m[max] = tmp;
			}
		}
		System.out.println(idx);
		for (int i = 0; i < idx; i++) {
			System.out.println(ans[i][0] + " " + ans[i][1]);
		}
		int p = sc.nextInt();
	}
}