//import java.util.Scanner;
//import java.util.Arrays;
//import java.util.ArrayList;
public class jarjestys {
public static void main (String[] args) {
Jarjestys();
}
public static void Jarjestys() {
// Scanner scanner = new Scanner(System.in);
IO io = new IO();
int a = io.nextInt();//scanner.nextInt();
int y;
int[] nums = new int[a];
//ArrayList<Integer> turns = new ArrayList<Integer>();
int[] turns = new int[a*2];
int nextIndex = 0;
for (int j = 0; j < a; j++) {
nums[j] = io.nextInt();//scanner.nextInt();
}
for (int i = a; i > 1; i--) {
//System.out.println("FL RES: " + findLargest(nums, i));
y = findLargest(nums, i);
if (y + 1 != i) {
// System.out.println("y: " + y + "preflip1:" + Arrays.toString(nums));
flip(nums, y);
// System.out.println("y: " + y + "afterflip1:" + Arrays.toString(nums));
turns[nextIndex++] = y + 1; //.add(y+1);
y = nums.length - a + i - 1;
flip(nums, y);
// System.out.println("x: " + x + "afterflip2" + Arrays.toString(nums));
turns[nextIndex++] = y + 1;//.add(y+1);
//System.out.println(Arrays.toString(nums));
}
}
//System.out.println(turns.size());
io.println(nextIndex);
//System.out.println(Arrays.toString(turns.toArray()));
for (int i = 0; i < nextIndex; i++) {
//System.out.print(turns.get(i) + " ");
io.print(turns[i] + " ");
}
io.close();
}
private static int findLargest(int[] array, int toSearch) { //returns indexOf(largest)
for(int i = 0; i < toSearch; i++) {
if (array[i] == toSearch) {
return i;
}
}
return -1;
}
private static void flip(int[] array, int toFlip) {
//System.out.println(toFlip);
int[] temp = int[toFlip+1];//Arrays.copyOfRange(array, 0, toFlip + 1); //-1??
for(int i = 0; i < toFlip + 1; i++) {
temp[i] = array[toFlip-i];
}
//System.out.println("TEMP:" + Arrays.toString(temp));
for(int i = 0; i <= toFlip; i++) {
//System.out.println(toFlip-i-1);
array[toFlip-i] = temp[i];
}
}
}