South African hacker history South African hacker history A brief history of computer hacking in South Africa. Note: A distinction needs to be made between a "white hat" hacker who hacks out of intellectual curiosity, and a "black hat" hacker who has ulterior motives. In recent times there has been an attempt to restore the meaning of the term hacker, which is still associated with creating code, and its secondary meaning, which has become the stuff of Hollywood legend. The term "cracker" is a better description for those who break into secured system by exploiting computer vulnerabilities. Activists are trapped by BOSS agents who
Prefix sum runs in linear time for integer keys that are smaller than the number of items, and is frequently used as part of radix sort, a fast algorithm for sorting integers that are less restricted in magnitude. List ranking, the problem of transforming a linked list into an array that represents the same sequence of items, can be viewed as computing a prefix sum on the sequence 1, 1, 1, ... and then mapping each item to the array position given by its prefix sum value; by combining list ranking, prefix sums, and Euler tours, many important problems on trees may