#include<iostream>
#include<set>
#include<unordered_set>
#include<map>
#include<unordered_map>
#include<vector>
#include<string>
#include<stack>
#include<queue>
using namespace std;

/*
  1. verify you understood the question and ask if you have any questions
  2. idea
  3. verify the idea
  4. write the code
  5. verify the code


*/


void print(int n){
  auto ret = spiral(n);
  for(auto a : ret){
    for(int x : a)
      cout<<x<<" ";
    cout<<endl;
  }
  cout<<"__________________"<<endl;
}


// https://leetcode.com/problems/pacific-atlantic-water-flow/

int main()
{


  //print(0);
  print(1);
  print(2);
  print(3);
  print(4);
  return 0;
}