Search Results for "permutations"

C Library designed to generate in sequence permutations or combinations (possible orderings or subsets) of objects, with or without repetition. To demonstrate the use of the library, a command-line program (disp) and a GTK graphical version (GDisp) are provided too, useful to teach combinatorics.

...It is designed to offer for C programmers common data structures with powerful algorithms, and hidden implementation. Available structures are lists, queues, stacks, hash tables, binary trees, binary search trees, red-black trees, 2D arrays, permutations, heaps and interval heaps. GDSL is free software distributed under the terms of the GNU General Public License.

This program was designed to taken an image file and return its absolute index out of all the possible permutations of images given the same width, height and colour depth. The program also works in reverse. Given an permutation index, width, height and colour depth the image can be reconstructed. The aim of this was to see if there was a relationship with the permutation index and similar images. For example, imagine consecutive frames of a movie: would these keys be spaced randomly or would there be a pattern. ...

Use prime numbers and pseudorandom number generators to create pseudorandom permutations to "shuffle" bits of given data (passwords, logins, PINs, files, directories). It is designed to be very secure (I hope so).