static int numLen ( int K ) {
  if ( K % 2 == 0 || K % 5 == 0 ) {
    return - 1 ;
  }
  int number = 0 ;
  int len = 1 ;
  for ( len = 1 ;
  len <= K ;
  len ++ ) {
    number = number * 10 + 1 ;
    if ( ( number % K == 0 ) ) {
      return len ;
    }
  }
  return - 1 ;
}

static int numLen ( int K ) { if ( K % 2 == 0 || K % 5 == 0 ) { return - 1 ; } int number = 0 ; int len = 1 ; for ( len = 1 ; len <= K ; len ++ ) { number = number * 10 + 1 ; if ( ( number % K == 0 ) ) { return len ; } } return - 1 ; }
(method_declaration (modifiers) type: (integral_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (integral_type) name: (identifier))) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (decimal_integer_literal)) right: (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (decimal_integer_literal)))) consequence: (block (return_statement (unary_expression operand: (decimal_integer_literal))))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (for_statement init: (assignment_expression left: (identifier) right: (decimal_integer_literal)) 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: (decimal_integer_literal)))) (if_statement condition: (parenthesized_expression (parenthesized_expression (binary_expression left: (binary_expression left: (identifier) right: (identifier)) right: (decimal_integer_literal)))) consequence: (block (return_statement (identifier)))))) (return_statement (unary_expression operand: (decimal_integer_literal)))))