import java.util.Scanner;

public class No258 {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		StringBuilder sb = new StringBuilder();
		int N = sc.nextInt(); //寿司の数
		int V[] = new int[N]; //寿司のおいしさ
		for(int i = 0;i < N;i++) {
			V[i] = sc.nextInt();
		}
		int dp[] = new int[N];
		String s2,s1,s;
		dp[0] = V[0];
		s2 = "1";
		s1 = "";
		s = "";
		if(N >= 2) {
			if(V[1] > dp[0]) {
				dp[1] = V[1];
				s1 = "2";
			}else {
				dp[1] = dp[0];
				s1 = s2;
			}
		}
		if(N == 2) {
			s = s1;
		}else if(N == 1){
			s = s2;
		}
		
		for(int i = 2;i < N;i++) {
			if(i > 2) {
				s2 = s1;
				s1 = s;
			}
			if(dp[i-2] + V[i] > dp[i-1]) {
				dp[i] = dp[i-2] + V[i];
				s = s2 + (i+1);
			}else {
				dp[i] = dp[i-1];
				s = s1;
			}
		}
		String str[] = s.split("");
		System.out.println(dp[N-1]);
		for(int i = 0;i < str.length;i++) {
			System.out.print(str[i] + " ");
		}
		System.out.println();
	}
}