static void printSequence ( int n , int s , int k ) {
  if ( s == 0 ) {
    for ( int i = 0 ;
    i < v . size ( ) ;
    i ++ ) System . out . print ( v . get ( i ) + " " ) ;
    System . out . println ( ) ;
    return ;
  }
  for ( int i = 0 ;
  i < k ;
  i ++ ) {
    v . add ( n + i ) ;
    printSequence ( n + i , s - 1 , k ) ;
    v . remove ( v . size ( ) - 1 ) ;
  }
  for ( int i = 1 ;
  i < k ;
  i ++ ) {
    v . add ( n - i ) ;
    printSequence ( n - i , s - 1 , k ) ;
    v . remove ( v . size ( ) - 1 ) ;
  }
}

static void printSequence ( int n , int s , int k ) { if ( s == 0 ) { for ( int i = 0 ; i < v . size ( ) ; i ++ ) System . out . print ( v . get ( i ) + " ▁ " ) ; System . out . println ( ) ; return ; } for ( int i = 0 ; i < k ; i ++ ) { v . add ( n + i ) ; printSequence ( n + i , s - 1 , k ) ; v . remove ( v . size ( ) - 1 ) ; } for ( int i = 1 ; i < k ; i ++ ) { v . add ( n - i ) ; printSequence ( n - i , s - 1 , k ) ; v . remove ( v . size ( ) - 1 ) ; } }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (integral_type) name: (identifier)) (formal_parameter type: (integral_type) name: (identifier)) (formal_parameter type: (integral_type) name: (identifier))) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) consequence: (block (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list))) update: (update_expression (identifier)) body: (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier))) right: (string_literal)))))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list))) (return_statement))) (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 (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (binary_expression left: (identifier) right: (identifier))))) (expression_statement (method_invocation name: (identifier) arguments: (argument_list (binary_expression left: (identifier) right: (identifier)) (binary_expression left: (identifier) right: (decimal_integer_literal)) (identifier)))) (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)) right: (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 (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (binary_expression left: (identifier) right: (identifier))))) (expression_statement (method_invocation name: (identifier) arguments: (argument_list (binary_expression left: (identifier) right: (identifier)) (binary_expression left: (identifier) right: (decimal_integer_literal)) (identifier)))) (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)) right: (decimal_integer_literal)))))))))