Version 1 was prepared at 1991 and was used for the exam on Discrete Analysis.
Version 2 includes some improvements of 1992 made by students of the faculty. Namely,
Version 3 includes some extensions and improvements of 1994, in particular, Fulkerson's algorithm of shortest tree of paths, Hungarian method for assignment problem, and some new problems combining binary arithmetics with probability. Now the year of examination also produced algorithmically.
Version 4 includes some extensions and improvements of 1995, and changes the policy of making variants. See Example 2 of datalist
Version 5 includes some extensions and improvements of 1996, mainly in combinatorics and arrangement the output for regular pages
Version 6 is a web-based program allows students to get personal tasks through WWW. All source was rewrited on PHP3 by Alexey Stepanov, 2000.