#define _USE_MATH_DEFINES
#include <cstdio>
#include <iostream>
#include <sstream>
#include <fstream>
#include <iomanip>
#include <algorithm>
#include <cmath>
#include <complex>
#include <string>
#include <vector>
#include <list>
#include <queue>
#include <stack>
#include <set>
#include <map>
#include <bitset>
#include <numeric>
#include <limits>
#include <climits>
#include <cfloat>
#include <functional>
using namespace std;

int main()
{
    int n;
    cin >> n;
    vector<int> v(n);
    for(int i=0; i<n; ++i)
        cin >> v[i];

    vector<int> dp = v;
    vector<int> prev(n, -1);
    for(int i=0; i<n; ++i){
        for(int j=2; j<=3; ++j){
            if(i - j >= 0 && dp[i] < dp[i-j] + v[i]){
                dp[i] = dp[i-j] + v[i];
                prev[i] = i - j;
            }
        }
    }

    vector<int> ans;
    ans.push_back(max_element(dp.begin(), dp.end()) - dp.begin());
    while(prev[ans.back()] != -1)
        ans.push_back(prev[ans.back()]);

    cout << dp[ans.front()] << endl;
    for(int i=ans.size()-1; i>0; --i)
        cout << (ans[i] + 1) << ' ';
    cout << (ans[0] + 1) << endl;

    return 0;
}