#include <bits/stdc++.h>
using namespace std;
int main() {
    int n; cin >> n;
    int a[n] = {};
    for (int i = 0; i < n; i++)
        cin >> a[i];
    int p[n] = {};
    iota(p, p + n, 0);
    sort(p, p + n, [&] (int x, int y) {
        if (a[x] != a[y]) return a[x] < a[y];
        else return x < y;
    });
    vector<pair<int, int>> res;
    for (int i = 0; i < n; i++) {
        for (int j = 0; j + 1 < n; j++) {
            if (p[j] > p[j + 1]) {
                res.emplace_back(p[j + 1], p[j]);
                swap(p[j], p[j + 1]);
            }
        }
    }
    cout << res.size() << "\n";
    for (auto i : res)
        cout << i.first + 1 << ‘ ‘ << i.second + 1 << "\n";
}