Problem: You are given a deck of n cards numbered from 1 to n (not necessarily in this order in the deck). You have to sort the deck by repeating the following operation. 

  * Choose 2 ≤ k ≤ n and split the deck in k nonempty contiguous parts D_1, D_2,..., D_k (D_1 contains the first |D_1| cards of the deck, D_2 contains the following |D_2| cards and so on). Then reverse the order of the parts, transforming the deck into D_k, D_{k-1}, ..., D_2, D_1 (so, the first |D_k| cards of the new deck are D_k, the following |D_{k-1}| cards are D_{k-1} and so on). The internal order of each packet of cards D_i is unchanged by the operation. 



You have to obtain a sorted deck (i.e., a deck where the first card is 1, the second is 2 and so on) performing at most n operations. It can be proven that it is always possible to sort the deck performing at most n operations.

Examples of operation: The following are three examples of valid operations (on three decks with different sizes). 

  * If the deck is [3 6 2 1 4 5 7] (so 3 is the first card and 7 is the last card), we may apply the operation with k=4 and D_1=[3 6], D_2=[2 1 4], D_3=[5], D_4=[7]. Doing so, the deck becomes [7 5 2 1 4 3 6]. 
  * If the deck is [3 1 2], we may apply the operation with k=3 and D_1=[3], D_2=[1], D_3=[2]. Doing so, the deck becomes [2 1 3]. 
  * If the deck is [5 1 2 4 3 6], we may apply the operation with k=2 and D_1=[5 1], D_2=[2 4 3 6]. Doing so, the deck becomes [2 4 3 6 5 1]. 

Input

The first line of the input contains one integer n (1≤ n≤ 52) — the number of cards in the deck.

The second line contains n integers c_1, c_2, ..., c_n — the cards in the deck. The first card is c_1, the second is c_2 and so on.

It is guaranteed that for all i=1,...,n there is exactly one j∈\{1,...,n\} such that c_j = i.

Output

On the first line, print the number q of operations you perform (it must hold 0≤ q≤ n).

Then, print q lines, each describing one operation.

To describe an operation, print on a single line the number k of parts you are going to split the deck in, followed by the size of the k parts: |D_1|, |D_2|, ... , |D_k|. 

It must hold 2≤ k≤ n, and |D_i|≥ 1 for all i=1,...,k, and |D_1|+|D_2|+⋅⋅⋅ + |D_k| = n.

It can be proven that it is always possible to sort the deck performing at most n operations. If there are several ways to sort the deck you can output any of them.

Examples

Input


4
3 1 2 4


Output


2
3 1 2 1
2 1 3


Input


6
6 5 4 3 2 1


Output


1
6 1 1 1 1 1 1


Input


1
1


Output


0

Note

Explanation of the first testcase: Initially the deck is [3 1 2 4]. 

  * The first operation splits the deck as [(3) (1 2) (4)] and then transforms it into [4 1 2 3]. 
  * The second operation splits the deck as [(4) (1 2 3)] and then transforms it into [1 2 3 4]. 

Explanation of the second testcase: Initially the deck is [6 5 4 3 2 1]. 

  * The first (and only) operation splits the deck as [(6) (5) (4) (3) (2) (1)] and then transforms it into [1 2 3 4 5 6]. 

Solution (in CPP):

Solution:
#include <bits/stdc++.h>
using namespace std;
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(0);
  int n;
  cin >> n;
  vector<int> c(n);
  for (int i = 0; i < n; ++i) {
    cin >> c[i];
  }
  vector<int> ord;
  {
    int l = (n + 1) / 2;
    int r = l;
    int it = 0;
    ord.push_back(l);
    while (l != 1 || r != n) {
      if (it % 2 == 1) {
        ord.push_back(--l);
      } else {
        ord.push_back(++r);
      }
      ++it;
    }
  }
  vector<vector<int>> ans;
  auto apply = [&](vector<int> go) {
    vector<vector<int>> gs;
    int uk = 0;
    for (int x : go) {
      vector<int> v;
      for (int j = 0; j < x; ++j) {
        v.push_back(c[uk++]);
      }
      gs.push_back(v);
    }
    reverse(gs.begin(), gs.end());
    c.clear();
    for (auto v : gs) {
      for (auto x : v) {
        c.push_back(x);
      }
    }
  };
  for (int i = 0; i < n; ++i) {
    vector<int> cur;
    auto add = [&](int x) {
      if (x > 0) {
        cur.push_back(x);
      }
    };
    if (i % 2 == 0) {
      int len = -1;
      for (int j = 0; j < n; ++j) {
        if (c[j] == ord[i]) {
          len = j - i + 1;
        }
      }
      assert(len > 0);
      add(i);
      add(len);
      add(n - i - len);
    } else {
      int len = -1;
      for (int j = 0; j < n; ++j) {
        if (c[j] == ord[i]) {
          len = n - j - i;
        }
      }
      assert(len > 0);
      add(n - i - len);
      add(len);
      add(i);
    }
    ans.push_back(cur);
    apply(cur);
  }
  assert(is_sorted(c.begin(), c.end()));
  int cnt = 0;
  for (auto v : ans) {
    if (v.size() > 1) {
      ++cnt;
    }
  }
  cout << cnt << '\n';
  for (auto v : ans) {
    if (v.size() > 1) {
      cout << v.size() << ' ';
      for (int x : v) {
        cout << x << ' ';
      }
      cout << '\n';
    }
  }
}