static int max_distinct_char ( String str , int n ) {
  int count [ ] = new int [ NO_OF_CHARS ] ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    count [ str . charAt ( i ) ] ++ ;
  }
  int max_distinct = 0 ;
  for ( int i = 0 ;
  i < NO_OF_CHARS ;
  i ++ ) {
    if ( count [ i ] != 0 ) {
      max_distinct ++ ;
    }
  }
  return max_distinct ;
}

static int max_distinct_char ( String str , int n ) { int count [ ] = new int [ NO_OF_CHARS ] ; for ( int i = 0 ; i < n ; i ++ ) { count [ str . charAt ( i ) ] ++ ; } int max_distinct = 0 ; for ( int i = 0 ; i < NO_OF_CHARS ; i ++ ) { if ( count [ i ] != 0 ) { max_distinct ++ ; } } return max_distinct ; }
(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))) 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 (identifier))))) (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 (expression_statement (update_expression (array_access array: (identifier) index: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier)))))))) (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: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (identifier)) update: (update_expression (identifier)) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (decimal_integer_literal))) consequence: (block (expression_statement (update_expression (identifier))))))) (return_statement (identifier))))