static int KDistinctVowel ( String s , int k ) {
  int n = s . length ( ) ;
  int [ ] c = new int [ MAX ] ;
  int result = - 1 ;
  for ( int i = 0 , j = - 1 ;
  i < n ;
  ++ i ) {
    char x = s . charAt ( i ) ;
    if ( isVowel ( x ) ) {
      if ( ++ c [ x ] == 1 ) {
        -- k ;
      }
    }
    while ( k < 0 ) {
      x = s . charAt ( ++ j ) ;
      if ( isVowel ( x ) ) {
        if ( -- c [ x ] == 0 ) {
          ++ k ;
        }
      }
    }
    if ( k == 0 ) {
      result = Math . max ( result , i - j ) ;
    }
  }
  return result ;
}

static int KDistinctVowel ( String s , int k ) { int n = s . length ( ) ; int [ ] c = new int [ MAX ] ; int result = - 1 ; for ( int i = 0 , j = - 1 ; i < n ; ++ i ) { char x = s . charAt ( i ) ; if ( isVowel ( x ) ) { if ( ++ c [ x ] == 1 ) { -- k ; } } while ( k < 0 ) { x = s . charAt ( ++ j ) ; if ( isVowel ( x ) ) { if ( -- c [ x ] == 0 ) { ++ k ; } } } if ( k == 0 ) { result = Math . max ( result , i - j ) ; } } return result ; }
(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) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (local_variable_declaration type: (array_type element: (integral_type) dimensions: (dimensions)) declarator: (variable_declarator name: (identifier) value: (array_creation_expression type: (integral_type) dimensions: (dimensions_expr (identifier))))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (unary_expression operand: (decimal_integer_literal)))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal)) declarator: (variable_declarator name: (identifier) value: (unary_expression operand: (decimal_integer_literal)))) condition: (binary_expression left: (identifier) right: (identifier)) update: (update_expression (identifier)) body: (block (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier))))) (if_statement condition: (parenthesized_expression (method_invocation name: (identifier) arguments: (argument_list (identifier)))) consequence: (block (if_statement condition: (parenthesized_expression (binary_expression left: (update_expression (array_access array: (identifier) index: (identifier))) right: (decimal_integer_literal))) consequence: (block (expression_statement (update_expression (identifier))))))) (while_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) body: (block (expression_statement (assignment_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (update_expression (identifier)))))) (if_statement condition: (parenthesized_expression (method_invocation name: (identifier) arguments: (argument_list (identifier)))) consequence: (block (if_statement condition: (parenthesized_expression (binary_expression left: (update_expression (array_access array: (identifier) index: (identifier))) right: (decimal_integer_literal))) consequence: (block (expression_statement (update_expression (identifier))))))))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) consequence: (block (expression_statement (assignment_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier) (binary_expression left: (identifier) right: (identifier)))))))))) (return_statement (identifier))))