import java.io.FileNotFoundException; import java.io.IOException; import java.io.InputStream; import java.util.ArrayDeque; import java.util.Arrays; import java.util.NoSuchElementException; import java.util.Scanner; public class Main { public static void main(String[] args) throws FileNotFoundException { long t = System.currentTimeMillis(); new Main().run(); System.err.println(System.currentTimeMillis() - t); } final long MOD=(long)1e9+7; void run() { Scanner sc = new Scanner(System.in); int N=sc.nextInt(); int[] V=new int[N]; int[][] max=new int[N][2]; for(int i=0;i=2?max[i-2][0]:0), (i>0?max[i-1][0]:0)); if(max[i][0]==V[i]+(i>=2?max[i-2][0]:0)){ max[i][1]=i; }else { max[i][1]=max[i-1][1]; } } ArrayDeque list=new ArrayDeque<>(); long ans=0; int p=N-1,res=max[p][0]; while(p>=0) { if(max[p][1]!=p||res!=max[p][0]) { --p; continue; } list.addFirst(p+1); ans+=V[p]; res-=V[p]; p-=2; } System.out.println(ans); while(!list.isEmpty()) { System.out.print(list.pollFirst()+(list.isEmpty()?"\n":" ")); } } static void tr(Object... objects) { System.out.println(Arrays.deepToString(objects)); } } class FastScanner { private final InputStream in = System.in; private final byte[] buffer = new byte[1024]; private int ptr = 0; private int buflen = 0; private boolean hasNextByte() { if (ptr < buflen) { return true; }else{ ptr = 0; try { buflen = in.read(buffer); } catch (IOException e) { e.printStackTrace(); } if (buflen <= 0) { return false; } } return true; } private int readByte() { if (hasNextByte()) return buffer[ptr++]; else return -1;} private static boolean isPrintableChar(int c) { return 33 <= c && c <= 126;} private void skipUnprintable() { while(hasNextByte() && !isPrintableChar(buffer[ptr])) ptr++;} public boolean hasNext() { skipUnprintable(); return hasNextByte();} public String next() { if (!hasNext()) throw new NoSuchElementException(); StringBuilder sb = new StringBuilder(); int b = readByte(); while(isPrintableChar(b)) { sb.appendCodePoint(b); b = readByte(); } return sb.toString(); } public long nextLong() { if (!hasNext()) throw new NoSuchElementException(); long n = 0; boolean minus = false; int b = readByte(); if (b == '-') { minus = true; b = readByte(); } if (b < '0' || '9' < b) { throw new NumberFormatException(); } while(true){ if ('0' <= b && b <= '9') { n *= 10; n += b - '0'; }else if(b == -1 || !isPrintableChar(b)){ return minus ? -n : n; }else{ throw new NumberFormatException(); } b = readByte(); } } public int nextInt() { return (int)nextLong(); } }