#ifdef NACHIA
#define _GLIBCXX_DEBUG
#else
// disable assert
#define NDEBUG
#endif
#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
using namespace std;
using ll = long long;
const ll INF = 1ll << 60;
#define REP(i,n) for(ll i=0; i<ll(n); i++)
template <class T> using V = vector<T>;
template <class A, class B> void chmax(A& l, const B& r){ if(l < r) l = r; }
template <class A, class B> void chmin(A& l, const B& r){ if(r < l) l = r; }

void testcase(){
    ll N; cin >> N;
    V<ll> A(N); REP(i,N) cin >> A[i];
    V<ll> ans;
    for(ll i=1; i<N; i++) for(ll j=i-1; j>=0; j--) if(A[j] > A[j+1]) ans.push_back(j+1), swap(A[j], A[j+1]);
    cout << "Yes\n";
    cout << ans.size() << "\n";
    for(auto a : ans) cout << a << "\n";
}

int main(){
  cin.tie(0)->sync_with_stdio(0);
  testcase();
  return 0;
}