import java.util.*;

class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int[] list = new int[n];
		for(int i = 0; i < n; i++) {
			list[i] = sc.nextInt();
		}
		if(n == 1) {
			System.out.println(list[0]);
			System.out.println(1);
			return;
		}
		int[] dp = new int[n];
		
		int[] pre = new int[n];
		dp[0] = list[0];
		pre[0] = -1;
		dp[1] = list[1];
		pre[1] = -1;
		
		
		for(int i = 2; i < n; i++) {
			if(i >= 3) {
				int a = dp[i-2] + list[i];
				int b = dp[i-3] + list[i];
				if(a < b) {
					dp[i] = b;
					pre[i] = i-3;
				}
				if(a >= b) {
					dp[i] = a;
					pre[i] = i-2;
				}
			}
			else {
				dp[i] = dp[i-2] + list[i];
				pre[i] = i-2;
			}
		}
		ArrayList<Integer> plist = new ArrayList<Integer>();
		if(dp[n-1] >= dp[n-2]) {
			int prenumber = n-1;
			while(prenumber != -1) {
				plist.add(prenumber);
				prenumber = pre[prenumber];
				
			}
		}
		else {
			int prenumber = n-2;
			while(prenumber != -1) {
				plist.add(prenumber);
				prenumber = pre[prenumber];
				
			}
		}
		System.out.println(Math.max(dp[n-1], dp[n-2]));
		System.out.print((plist.get(plist.size()-1) + 1));
		for(int i = plist.size()-2; i >= 0; i--) {
			System.out.print(" " + (plist.get(i) + 1));
		}
		System.out.println();
		
		
		
	}
}