// #define _GLIBCXX_DEBUG 
#include<bits/stdc++.h>
using namespace std;

using uint = unsigned int;
using ll = long long;

#define CIN( LL , A ) LL A; cin >> A 
#define GETLINE( A ) string A; getline( cin , A ) 
#define GETLINE_SEPARATE( A , SEPARATOR ) string A; getline( cin , A , SEPARATOR ) 
#define UNTIE ios_base::sync_with_stdio( false ); cin.tie( nullptr ) 
#define FOR( VAR , INITIAL , FINAL_PLUS_ONE ) for( ll VAR = INITIAL ; VAR < FINAL_PLUS_ONE ; VAR ++ ) 
#define FOREQ( VAR , INITIAL , FINAL ) for( ll VAR = INITIAL ; VAR <= FINAL ; VAR ++ ) 
#define FOR_ITR( ARRAY , ITR , END ) for( auto ITR = ARRAY .begin() , END = ARRAY .end() ; ITR != END ; ITR ++ ) 
#define REPEAT( HOW_MANY_TIMES ) FOR( VARIABLE_FOR_REPEAT , 0 , HOW_MANY_TIMES )
#define QUIT return 0 
#define RETURN( ANSWER ) cout << ( ANSWER ) << "\n"; QUIT 
#define DOUBLE( PRECISION , ANSWER ) cout << fixed << setprecision( PRECISION ) << ( ANSWER ) << "\n"; QUIT 
#define MIN( A , B ) A < B ? A : B;
#define MAX( A , B ) A < B ? B : A;

template <typename T> inline T Absolute( const T& a ){ return a > 0 ? a : - a; }


int main()
{
  UNTIE;
  CIN( int , N );
  int A[100001];
  int i = N;
  while( i != 0 ){
    cin >> A[--i];
  }
  string Bi = to_string( N ) + " ";
  int Ai_dif = A[0];
  int Ai_prev = Ai_dif;
  while( ++i < N ){
    int& Ai = A[i];
    if( Ai != Ai_prev ){
      REPEAT( Ai_dif ){
	cout << Bi;
      }
      Bi = to_string( N - i ) + " ";
      Ai_dif = Ai - Ai_prev;
      Ai_prev = Ai;
    }
  }
  {
    Bi = Bi.substr( 0 , Bi.size() - 1 );
    cout << Bi;
    Bi = " " + Bi;
    Ai_dif--;
    REPEAT( Ai_dif ){
      cout << Bi;
    }
  }
  RETURN( "" );
}