#include<bits/stdc++.h>
using namespace std;
#define rep(i,a,b) for(int i=a;i<b;i++)

int N;
int A[100];
//-----------------------------------------------------------------
int main() {
	cin >> N;
	rep(i, 0, N) cin >> A[i];

	vector<pair<int, int> > ans;
	rep(i, 0, N) {
		int _max = i;
		rep(j, i + 1, N) if (A[_max] < A[j]) _max = j;
		if (_max != i) {
			ans.push_back(make_pair(i, _max));
			swap(A[i], A[_max]);
		}
	}

	cout << ans.size() << endl;
	for (auto p : ans) printf("%d %d\n", p.first, p.second);

	int d; cin >> d;
}