#include <bits/stdc++.h>
#define REP(i,n,N) for(int i=(n);i<(int) N;i++)
#define p(s) cout<<(s)<<endl
#define F first
#define S second
using namespace std;


int main() {
	int n;
	cin>>n;
	int A[110];
	vector<pair<int,int>> ans;
	REP(i,0,n) cin>>A[i];
	REP(i,0,n){
		int mx=i;
		REP(j,i+1,n) if(A[mx]<A[j]) mx=j;
		if(mx!=i){
			ans.push_back({i,mx});
			swap(A[i],A[mx]);
		}
	}
	p(ans.size());
	for(auto p:ans) cout<<p.F<<" "<<p.S<<endl;
	cin>>n;
	return 0;
}