//import java.util.Scanner;
//import java.util.Arrays;
//import java.util.ArrayList;
public class jarjestys {
//ArrayList<Integer> turns;
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 a = scanner.nextInt();
int y;
int[] nums = new int[a];
// ArrayList<Integer> turns = new ArrayList<Integer>();
for (int j = 0; j < a; j++) {
nums[j] = io.nextInt();//scanner.nextInt();
//nums[j] = scanner.nextInt();
}
// System.out.println(2*a);
io.println(2*a);
for (int i = a; i >= 1; i--) {
nums = findLargest(nums, 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.add(y+1);
y = nums.length - a + i - 1;
flip(nums, y);
// System.out.println("x: " + x + "afterflip2" + Arrays.toString(nums));
turns.add(y+1);
//System.out.println(Arrays.toString(nums));
*/
}
/*
//System.out.println(turns.size());
//io.println(turns.size());
//System.out.println(Arrays.toString(turns.toArray()));
for (int i = 0; i < turns.size(); i++) {
System.out.print(turns.get(i) + " ");
//io.print(turns.get(i) + " ");
}
//io.close();
//*/
}
private static int[] findLargest(int[] array, int toSearch) { //returns indexOf(largest)
//System.out.println(toSearch);
int[] temp = new int[toSearch];
int i = 0;
int count = 0;
int count2 = 0;
for(i = 0; i < toSearch; i++) {
if (array[i] == toSearch) {
//print toSeearch loc, i + 1
int index = i + 1;
//System.out.print(index + " ");
io.print(index + " ");
//print toSearch
//System.out.print(toSearch + " ");
io.print(toSearch + " ");
for (int k = toSearch - 1; k > i; k--) {
temp[count] = array[k];
count++;
}
for (int j = count; j < toSearch - 1; j++) {
temp[j] = array[count2];
count2++;
}
return temp;
}
}
/*
return -1;
*/
return new int[1];
}
/*
private static void flip(int[] array, int toFlip) {
//System.out.println(toFlip);
int[] temp = Arrays.copyOfRange(array, 0, toFlip + 1); //-1??
//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];
}
}
*/
}
