public static void main ( String [ ] args ) throws Exception {
  Scanner sc = new Scanner ( System . in ) ;
  double rad = Math . abs ( ( double ) ( sc . nextInt ( ) % 12 ) * 30 - ( double ) sc . nextInt ( ) * ( 11.0 / 2 ) ) ;
  System . out . println ( Math . min ( rad , 360.0 - rad ) ) ;
}

public static void main ( String [ ] args ) throws Exception { Scanner sc = new Scanner ( System . in ) ; double rad = Math . abs ( ( double ) ( sc . nextInt ( ) % 12 ) * 30 - ( double ) sc . nextInt ( ) * ( 11.0 / 2 ) ) ; System . out . println ( Math . min ( rad , 360.0 - rad ) ) ; }
(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 (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 (binary_expression left: (binary_expression left: (cast_expression type: (floating_point_type) value: (parenthesized_expression (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)) right: (decimal_integer_literal)))) right: (decimal_integer_literal)) right: (binary_expression left: (cast_expression type: (floating_point_type) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list))) right: (parenthesized_expression (binary_expression left: (decimal_floating_point_literal) right: (decimal_integer_literal))))))))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier) (binary_expression left: (decimal_floating_point_literal) right: (identifier)))))))))