public static void main ( String [ ] args ) {
  int n ;
  String cells ;
  Scanner sc = new Scanner ( System . in ) ;
  int affectedCells = 0 ;
  n = sc . nextInt ( ) ;
  cells = sc . next ( ) ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    if ( cells . charAt ( i ) == '1' ) {
      affectedCells ++ ;
    }
    else {
      affectedCells ++ ;
      break ;
    }
  }
  System . out . println ( affectedCells ) ;
}

public static void main ( String [ ] args ) { int n ; String cells ; Scanner sc = new Scanner ( System . in ) ; int affectedCells = 0 ; n = sc . nextInt ( ) ; cells = sc . next ( ) ; for ( int i = 0 ; i < n ; i ++ ) { if ( cells . charAt ( i ) == '1' ) { affectedCells ++ ; } else { affectedCells ++ ; break ; } } System . out . println ( affectedCells ) ; }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (array_type element: (type_identifier) dimensions: (dimensions)) name: (identifier))) body: (block (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier))) (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier))) (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: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (expression_statement (assignment_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (expression_statement (assignment_expression left: (identifier) right: (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: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier))) right: (character_literal))) consequence: (block (expression_statement (update_expression (identifier)))) alternative: (block (expression_statement (update_expression (identifier))) (break_statement))))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (identifier))))))