static long number ( String s , int i , int j ) {
  long ans = 0 ;
  for ( int x = i ;
  x < j ;
  x ++ ) {
    ans = ans * 2 + ( s . charAt ( x ) - '0' ) ;
  }
  return ans ;
}

static long number ( String s , int i , int j ) { long ans = 0 ; for ( int x = i ; x < j ; x ++ ) { ans = ans * 2 + ( s . charAt ( x ) - '0' ) ; } return ans ; }
(method_declaration (modifiers) type: (integral_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (type_identifier) name: (identifier)) (formal_parameter type: (integral_type) 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: (identifier))) condition: (binary_expression left: (identifier) right: (identifier)) update: (update_expression (identifier)) body: (block (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (parenthesized_expression (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier))) right: (character_literal)))))))) (return_statement (identifier))))