#include<bits/stdc++.h>
#define rep(i,a,b) for(int i=int(a);i<int(b);++i)
using namespace std;
typedef long long ll;
int INF = (1LL << 30) - 1;
int MOD = 1e9+7;
main(){
    int N;
    cin >> N;
    vector<int> V(N),dp(N+1);
    rep(i,0,N)cin >> V[i];
    dp[1] = V[0];
    rep(i,2,N+1){
        dp[i] = max(dp[i-2] + V[i-1], dp[i-1]);
    }
    cout << dp[N] << endl;
    set<int> st;
    for(int i = N;i > 0;){
        if(dp[i] == dp[i-1])i--;
        else{
            st.insert(i);
            i -= 2;
        }
    }
    for(auto i:st)cout << i << " ";
}