static int findCount ( String s , int n , int a , int b ) {
  int res = 0 ;
  char [ ] s1 = s . toCharArray ( ) ;
  for ( int i = 0 ;
  i < b ;
  i ++ ) {
    if ( i == a ) {
      if ( s1 [ n - i - 1 ] != '1' ) res += 1 ;
    }
    else {
      if ( s1 [ n - i - 1 ] != '0' ) res += 1 ;
    }
  }
  return res ;
}

static int findCount ( String s , int n , int a , int b ) { int res = 0 ; char [ ] s1 = s . toCharArray ( ) ; for ( int i = 0 ; i < b ; i ++ ) { if ( i == a ) { if ( s1 [ n - i - 1 ] != '1' ) res += 1 ; } else { if ( s1 [ n - i - 1 ] != '0' ) res += 1 ; } } return res ; }
(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)) (formal_parameter type: (integral_type) name: (identifier))) body: (block (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (local_variable_declaration type: (array_type element: (integral_type) dimensions: (dimensions)) declarator: (variable_declarator name: (identifier) value: (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: (block (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) consequence: (block (if_statement condition: (parenthesized_expression (binary_expression left: (array_access array: (identifier) index: (binary_expression left: (binary_expression left: (identifier) right: (identifier)) right: (decimal_integer_literal))) right: (character_literal))) consequence: (expression_statement (assignment_expression left: (identifier) right: (decimal_integer_literal))))) alternative: (block (if_statement condition: (parenthesized_expression (binary_expression left: (array_access array: (identifier) index: (binary_expression left: (binary_expression left: (identifier) right: (identifier)) right: (decimal_integer_literal))) right: (character_literal))) consequence: (expression_statement (assignment_expression left: (identifier) right: (decimal_integer_literal)))))))) (return_statement (identifier))))