dd(low, high, n) = let diff = size(high) - size(low) c_1, .. c_n = Partition von (high - low) if exists i : test (low + c_i) == FAIL then dd( ) else if exists i : test (high - c_i) == OK then dd( ) else if exists i : test (low + c_i) == OK then dd( ) else if exists i : test (high - c_i) == FAIL then dd( ) else if n < diff then dd( ) else (low, high)http://www.infosun.fim.uni-passau.de/st/papers/computer2000/