public static void main ( final String [ ] args ) {
  Scanner cin = new Scanner ( System . in ) ;
  BigDecimal p , q ;
  p = cin . nextBigDecimal ( ) ;
  q = cin . nextBigDecimal ( ) ;
  n = cin . nextInt ( ) ;
  for ( int i = 1 ;
  i <= n ;
  i ++ ) a [ i ] = cin . nextLong ( ) ;
  BigDecimal s1 = p . divide ( q , 45 , BigDecimal . ROUND_HALF_DOWN ) ;
  BigDecimal s2 = f ( 1 ) ;
  if ( s1 . equals ( s2 ) ) System . out . println ( "YES" ) ;
  else System . out . println ( "NO" ) ;
  cin . close ( ) ;
}

public static void main ( final String [ ] args ) { Scanner cin = new Scanner ( System . in ) ; BigDecimal p , q ; p = cin . nextBigDecimal ( ) ; q = cin . nextBigDecimal ( ) ; n = cin . nextInt ( ) ; for ( int i = 1 ; i <= n ; i ++ ) a [ i ] = cin . nextLong ( ) ; BigDecimal s1 = p . divide ( q , 45 , BigDecimal . ROUND_HALF_DOWN ) ; BigDecimal s2 = f ( 1 ) ; if ( s1 . equals ( s2 ) ) System . out . println ( " YES " ) ; else System . out . println ( " NO " ) ; cin . close ( ) ; }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters (formal_parameter (modifiers) 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: (type_identifier) declarator: (variable_declarator name: (identifier)) declarator: (variable_declarator name: (identifier))) (expression_statement (assignment_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (expression_statement (assignment_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (expression_statement (assignment_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (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: (type_identifier) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier) (decimal_integer_literal) (field_access object: (identifier) field: (identifier)))))) (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (method_invocation name: (identifier) arguments: (argument_list (decimal_integer_literal))))) (if_statement condition: (parenthesized_expression (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier)))) consequence: (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (string_literal)))) alternative: (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (string_literal))))) (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))))