public static void main ( String args [ ] ) throws IOException {
  int n = sc . nextInt ( ) ;
  int a [ ] = new int [ n ] ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) a [ i ] = sc . nextInt ( ) ;
  boolean f = false ;
  int c = 0 ;
  if ( n % 2 == 0 ) {
    System . out . println ( "no" ) ;
    f = true ;
  }
  else if ( a [ 0 ] % 2 != 0 && a [ n - 1 ] % 2 != 0 ) {
    f = true ;
    System . out . println ( "yes" ) ;
  }
  else {
    for ( int i = 0 ;
    i < n ;
    i ++ ) {
      if ( a [ 0 ] % 2 == 0 ) {
        f = true ;
        System . out . println ( "no" ) ;
        break ;
      }
      else if ( a [ i ] % 2 == 0 ) {
        c ++ ;
        if ( c >= 1 ) {
          f = true ;
          System . out . println ( "No" ) ;
          break ;
        }
      }
      else continue ;
    }
  }
  if ( f == false ) System . out . println ( "yes" ) ;
}

public static void main ( String args [ ] ) throws IOException { int n = sc . nextInt ( ) ; int a [ ] = new int [ n ] ; for ( int i = 0 ; i < n ; i ++ ) a [ i ] = sc . nextInt ( ) ; boolean f = false ; int c = 0 ; if ( n % 2 == 0 ) { System . out . println ( " no " ) ; f = true ; } else if ( a [ 0 ] % 2 != 0 && a [ n - 1 ] % 2 != 0 ) { f = true ; System . out . println ( " yes " ) ; } else { for ( int i = 0 ; i < n ; i ++ ) { if ( a [ 0 ] % 2 == 0 ) { f = true ; System . out . println ( " no " ) ; break ; } else if ( a [ i ] % 2 == 0 ) { c ++ ; if ( c >= 1 ) { f = true ; System . out . println ( " No " ) ; break ; } } else continue ; } } if ( f == false ) System . out . println ( " yes " ) ; }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (type_identifier) name: (identifier) dimensions: (dimensions))) (throws (type_identifier)) body: (block (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) dimensions: (dimensions) value: (array_creation_expression type: (integral_type) 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: (expression_statement (assignment_expression left: (array_access array: (identifier) index: (identifier)) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list))))) (local_variable_declaration type: (boolean_type) declarator: (variable_declarator name: (identifier) value: (false))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (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 (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (string_literal)))) (expression_statement (assignment_expression left: (identifier) right: (true)))) alternative: (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (binary_expression left: (array_access array: (identifier) index: (decimal_integer_literal)) right: (decimal_integer_literal)) right: (decimal_integer_literal)) right: (binary_expression left: (binary_expression left: (array_access array: (identifier) index: (binary_expression left: (identifier) right: (decimal_integer_literal))) right: (decimal_integer_literal)) right: (decimal_integer_literal)))) consequence: (block (expression_statement (assignment_expression left: (identifier) right: (true))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (string_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: (binary_expression left: (array_access array: (identifier) index: (decimal_integer_literal)) right: (decimal_integer_literal)) right: (decimal_integer_literal))) consequence: (block (expression_statement (assignment_expression left: (identifier) right: (true))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (string_literal)))) (break_statement)) alternative: (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (decimal_integer_literal)) right: (decimal_integer_literal))) consequence: (block (expression_statement (update_expression (identifier))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) consequence: (block (expression_statement (assignment_expression left: (identifier) right: (true))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (string_literal)))) (break_statement)))) alternative: (continue_statement)))))))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (false))) consequence: (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (string_literal)))))))