static boolean allones ( String s , int n ) {
  int co = 0 ;
  for ( int i = 0 ;
  i < s . length ( ) ;
  i ++ ) if ( s . charAt ( i ) == '1' ) co += 1 ;
  return ( co == n ) ;
}

static boolean allones ( String s , int n ) { int co = 0 ; for ( int i = 0 ; i < s . length ( ) ; i ++ ) if ( s . charAt ( i ) == '1' ) co += 1 ; return ( co == n ) ; }
(method_declaration (modifiers) type: (boolean_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (type_identifier) name: (identifier)) (formal_parameter type: (integral_type) name: (identifier))) body: (block (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: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list))) update: (update_expression (identifier)) body: (if_statement condition: (parenthesized_expression (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier))) right: (character_literal))) consequence: (expression_statement (assignment_expression left: (identifier) right: (decimal_integer_literal))))) (return_statement (parenthesized_expression (binary_expression left: (identifier) right: (identifier))))))