public static void main ( String [ ] args ) throws IOException {
  FastReader sc = new FastReader ( ) ;
  PrintWriter out = new PrintWriter ( System . out ) ;
  double d = sc . nextDouble ( ) ;
  double h = sc . nextDouble ( ) ;
  double v = sc . nextDouble ( ) ;
  double e = sc . nextDouble ( ) ;
  double v1 = 4 * v / ( Math . PI * d * d ) ;
  out . println ( e > v1 ? "NO" : "YES\n" + h / ( v1 - e ) ) ;
  out . close ( ) ;
}

public static void main ( String [ ] args ) throws IOException { FastReader sc = new FastReader ( ) ; PrintWriter out = new PrintWriter ( System . out ) ; double d = sc . nextDouble ( ) ; double h = sc . nextDouble ( ) ; double v = sc . nextDouble ( ) ; double e = sc . nextDouble ( ) ; double v1 = 4 * v / ( Math . PI * d * d ) ; out . println ( e > v1 ? " NO " : " YES \n " + h / ( v1 - e ) ) ; out . close ( ) ; }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (array_type element: (type_identifier) dimensions: (dimensions)) name: (identifier))) (throws (type_identifier)) body: (block (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (object_creation_expression type: (type_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: (floating_point_type) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (local_variable_declaration type: (floating_point_type) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (local_variable_declaration type: (floating_point_type) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (local_variable_declaration type: (floating_point_type) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (local_variable_declaration type: (floating_point_type) declarator: (variable_declarator name: (identifier) value: (binary_expression left: (binary_expression left: (decimal_integer_literal) right: (identifier)) right: (parenthesized_expression (binary_expression left: (binary_expression left: (field_access object: (identifier) field: (identifier)) right: (identifier)) right: (identifier)))))) (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (ternary_expression condition: (binary_expression left: (identifier) right: (identifier)) consequence: (string_literal) alternative: (binary_expression left: (string_literal) right: (binary_expression left: (identifier) right: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))))))))) (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))))