public static void main ( String [ ] args ) {
  Scanner sc = new Scanner ( System . in ) ;
  int n = ( int ) sc . nextLong ( ) ;
  PrintWriter pw = new PrintWriter ( System . out ) ;
  Long [ ] x = new Long [ n ] ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    x [ i ] = sc . nextLong ( ) ;
  }
  Arrays . sort ( x ) ;
  int z = n / 2 ;
  if ( n % 2 == 0 ) {
    for ( int i = 0 ;
    i < z ;
    i ++ ) {
      if ( i != 0 ) System . out . print ( " " ) ;
      System . out . print ( x [ i ] + " " + x [ x . length - i - 1 ] ) ;
    }
  }
  else {
    for ( int i = 0 ;
    i < z ;
    i ++ ) {
      if ( i != 0 ) System . out . print ( " " ) ;
      System . out . print ( x [ i ] + " " + x [ x . length - i - 1 ] ) ;
    }
    System . out . print ( " " + x [ z ] ) ;
  }
}

public static void main ( String [ ] args ) { Scanner sc = new Scanner ( System . in ) ; int n = ( int ) sc . nextLong ( ) ; PrintWriter pw = new PrintWriter ( System . out ) ; Long [ ] x = new Long [ n ] ; for ( int i = 0 ; i < n ; i ++ ) { x [ i ] = sc . nextLong ( ) ; } Arrays . sort ( x ) ; int z = n / 2 ; if ( n % 2 == 0 ) { for ( int i = 0 ; i < z ; i ++ ) { if ( i != 0 ) System . out . print ( " ▁ " ) ; System . out . print ( x [ i ] + " ▁ " + x [ x . length - i - 1 ] ) ; } } else { for ( int i = 0 ; i < z ; i ++ ) { if ( i != 0 ) System . out . print ( " ▁ " ) ; System . out . print ( x [ i ] + " ▁ " + x [ x . length - i - 1 ] ) ; } System . out . print ( " ▁ " + x [ z ] ) ; } }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (array_type element: (type_identifier) dimensions: (dimensions)) name: (identifier))) body: (block (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (object_creation_expression type: (type_identifier) arguments: (argument_list (field_access object: (identifier) field: (identifier)))))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (cast_expression type: (integral_type) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list))))) (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (object_creation_expression type: (type_identifier) arguments: (argument_list (field_access object: (identifier) field: (identifier)))))) (local_variable_declaration type: (array_type element: (type_identifier) dimensions: (dimensions)) declarator: (variable_declarator name: (identifier) value: (array_creation_expression type: (type_identifier) dimensions: (dimensions_expr (identifier))))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (identifier)) update: (update_expression (identifier)) body: (block (expression_statement (assignment_expression left: (array_access array: (identifier) index: (identifier)) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))))) (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier)))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (binary_expression left: (identifier) right: (decimal_integer_literal)))) (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (decimal_integer_literal))) consequence: (block (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (identifier)) update: (update_expression (identifier)) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) consequence: (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (string_literal))))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (binary_expression left: (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (string_literal)) right: (array_access array: (identifier) index: (binary_expression left: (binary_expression left: (field_access object: (identifier) field: (identifier)) right: (identifier)) right: (decimal_integer_literal)))))))))) alternative: (block (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (identifier)) update: (update_expression (identifier)) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) consequence: (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (string_literal))))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (binary_expression left: (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (string_literal)) right: (array_access array: (identifier) index: (binary_expression left: (binary_expression left: (field_access object: (identifier) field: (identifier)) right: (identifier)) right: (decimal_integer_literal))))))))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (binary_expression left: (string_literal) right: (array_access array: (identifier) index: (identifier))))))))))