#include<bits/stdc++.h>
#define int long long
using namespace std;
int inf=1e18;
signed main(){
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
	int n;cin>>n;
	vector<int>now(n);
	for(int i=0;i<n;i++)now[i]=i;
	vector<int>p(n);
	for(int i=0;i<n;i++){
		int P;cin>>P;
		P--;
		p[P]=i;
	}
	vector<int>id(n);
	for(int i=0;i<n;i++)id[p[i]]=i;
	vector<int>ans;
	while(true){
		bool ok=true;
		for(int i=0;i<n;i++)if(now[i]!=p[i])ok=false;
		if(ok)break;	
		for(int i=0;i<n-1;i++){
			if(id[now[i]]>id[now[i+1]]){
				ans.push_back(i);
				swap(now[i],now[i+1]);
				break;
			}
		}
	}
	cout<<"Yes"<<endl;
	cout<<ans.size()<<endl;
	for(int i:ans)cout<<i+1<<"\n";
}