public static void main ( String [ ] args ) {
  Scanner sc = new Scanner ( System . in ) ;
  int k = sc . nextInt ( ) ;
  int [ ] a = new int [ k ] ;
  for ( int i = 0 ;
  i < k ;
  i ++ ) {
    a [ i ] = sc . nextInt ( ) ;
  }
  long max = 2 ;
  long min = 2 ;
  for ( int i = k - 1 ;
  i >= 0 ;
  i -- ) {
    max = ( long ) Math . floor ( ( double ) max / a [ i ] ) * a [ i ] + a [ i ] - 1 ;
    min = ( long ) Math . ceil ( ( double ) min / a [ i ] ) * a [ i ] ;
  }
  if ( max < min ) {
    System . out . println ( - 1 ) ;
  }
  else {
    System . out . println ( min + " " + max ) ;
  }
}

public static void main ( String [ ] args ) { Scanner sc = new Scanner ( System . in ) ; int k = sc . nextInt ( ) ; int [ ] a = new int [ k ] ; for ( int i = 0 ; i < k ; i ++ ) { a [ i ] = sc . nextInt ( ) ; } long max = 2 ; long min = 2 ; for ( int i = k - 1 ; i >= 0 ; i -- ) { max = ( long ) Math . floor ( ( double ) max / a [ i ] ) * a [ i ] + a [ i ] - 1 ; min = ( long ) Math . ceil ( ( double ) min / a [ i ] ) * a [ i ] ; } if ( max < min ) { System . out . println ( - 1 ) ; } else { System . out . println ( min + " ▁ " + max ) ; } }
(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: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (local_variable_declaration type: (array_type element: (integral_type) dimensions: (dimensions)) declarator: (variable_declarator name: (identifier) 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: (block (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: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (binary_expression left: (identifier) right: (decimal_integer_literal)))) condition: (binary_expression left: (identifier) right: (decimal_integer_literal)) update: (update_expression (identifier)) body: (block (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (binary_expression left: (binary_expression left: (cast_expression type: (integral_type) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (binary_expression left: (cast_expression type: (floating_point_type) value: (identifier)) right: (array_access array: (identifier) index: (identifier)))))) right: (array_access array: (identifier) index: (identifier))) right: (array_access array: (identifier) index: (identifier))) right: (decimal_integer_literal)))) (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (cast_expression type: (integral_type) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (binary_expression left: (cast_expression type: (floating_point_type) value: (identifier)) right: (array_access array: (identifier) index: (identifier)))))) right: (array_access array: (identifier) index: (identifier))))))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) consequence: (block (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (unary_expression operand: (decimal_integer_literal)))))) alternative: (block (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (binary_expression left: (binary_expression left: (identifier) right: (string_literal)) right: (identifier)))))))))