import java.io.*;
import java.util.*;
import java.util.stream.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner();
        int n = sc.nextInt();
        ArrayList<TreeMap<Integer, Integer>> lis = new ArrayList<>();
        for (int i = 0; i <= n; i++) {
            lis.add(new TreeMap<>());
            lis.get(i).put(0, Integer.MAX_VALUE);
        }
        lis.get(0).put(0, 0);
        int max = 0;
        for (int i = 1; i <= n; i++) {
            int x = sc.nextInt();
            int left = 0;
            int right = max + 1;
            while (right - left > 1) {
                int m = (left + right) / 2;
                if (lis.get(m).lastEntry().getValue() < x) {
                    left = m;
                } else {
                    right = m;
                }
            }
            lis.get(right).put(i, x);
            max = Math.max(max, right);
        }
        int last = Integer.MAX_VALUE;
        ArrayList<Integer> ans = new ArrayList<>();
        for (int i = max; i > 0; i--) {
            int x = lis.get(i).lowerKey(last);
            int tmp = lis.get(i).get(x);
            if (lis.get(i).lowerKey(x) == 0) {
                ans.add(tmp);
            }
            last = x;
        }
        System.out.println(ans.size());
        Collections.sort(ans);
        System.out.println(ans.stream().map(x -> x.toString()).collect(Collectors.joining(" ")));
    }
    
}
class Utilities {
    static String arrayToLineString(Object[] arr) {
        return Arrays.stream(arr).map(x -> x.toString()).collect(Collectors.joining("\n"));
    }
    
    static String arrayToLineString(int[] arr) {
        return String.join("\n", Arrays.stream(arr).mapToObj(String::valueOf).toArray(String[]::new));
    }
}
class Scanner {
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    StringTokenizer st = new StringTokenizer("");
    StringBuilder sb = new StringBuilder();
    
    public Scanner() throws Exception {
        
    }
    
    public int nextInt() throws Exception {
        return Integer.parseInt(next());
    }
    
    public long nextLong() throws Exception {
        return Long.parseLong(next());
    }
    
    public double nextDouble() throws Exception {
        return Double.parseDouble(next());
    }
    
    public int[] nextIntArray() throws Exception {
        return Stream.of(br.readLine().split(" ")).mapToInt(Integer::parseInt).toArray();
    }
    
    public String next() throws Exception {
        while (!st.hasMoreTokens()) {
            st = new StringTokenizer(br.readLine());
        }
        return st.nextToken();
    }
    
}