#include <bits/stdc++.h>
using namespace std;
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  int t;
  t = 1;
  while (t--) {
    int n;
    cin >> n;
    int a[n];
    vector<pair<int, int>> v;
    for (int i = 0; i < n; i++) {
      cin >> a[i];
    }
    for (int i = 0; i < n; i++) {
      int j = i;
      for (int t = i; t < n; t++) {
        if (a[j] > a[t]) {
          j = t;
        }
      }
      if (i != j) {
        v.push_back(make_pair(i, j));
      }
      swap(a[i], a[j]);
    }
    cout << v.size() << endl;
    for (auto i : v) {
      cout << i.first << " " << i.second << endl;
    }
  }
  return 0;
}
