static boolean validate ( long n ) {
  int count [ ] = new int [ 10 ] ;
  while ( n > 0 ) {
    int r = ( int ) n % 10 ;
    if ( count [ r ] == r ) return false ;
    count [ r ] ++ ;
    n /= 10 ;
  }
  return true ;
}

static boolean validate ( long n ) { int count [ ] = new int [ 10 ] ; while ( n > 0 ) { int r = ( int ) n % 10 ; if ( count [ r ] == r ) return false ; count [ r ] ++ ; n /= 10 ; } return true ; }
(method_declaration (modifiers) type: (boolean_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (integral_type) name: (identifier))) body: (block (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) dimensions: (dimensions) value: (array_creation_expression type: (integral_type) dimensions: (dimensions_expr (decimal_integer_literal))))) (while_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) body: (block (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (binary_expression left: (cast_expression type: (integral_type) value: (identifier)) right: (decimal_integer_literal)))) (if_statement condition: (parenthesized_expression (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (identifier))) consequence: (return_statement (false))) (expression_statement (update_expression (array_access array: (identifier) index: (identifier)))) (expression_statement (assignment_expression left: (identifier) right: (decimal_integer_literal))))) (return_statement (true))))