#include "iostream"
using namespace std;

int N;
int num[100];
int box;
int ans;
int first[10000];
int second[10000];

int main() {
	cin >> N;
	for (int i = 0; i < N; i++) {
		cin >> num[i];
	}
	for (int i = 0; i < N-1; i++) {
		for (int j = i+1; j < N; j++) {
			if (num[i] < num[j]) {
				box = num[i];
				num[i] = num[j];
				num[j] = box;
				first[ans] = i;
				second[ans] = j;
				ans++;
			}
		}
	}
	cout << ans << "\n";
	for (int i = 0; i < ans; i++) {
		cout << first[i] << " " << second[i] << "\n";
	}
	cout << endl;
	cin >> ans;
	return 0;
}