An O(ND) Difference Algorithm and its Variations (1986, Eugene W. Myers) is a fantastic paper and you may want to start there. It includes pseudo-code and a nice visualization of the graph …

The algorithm has the same worst case complexity as Djikstra's, but in the average case the expected runtime is linear in the size of the graph, which is much faster than the pure Dijkstra. …

Aug 26, 2008 · Some of the answers do refer to Vincenty's formula for ellipsoids, but that algorithm was designed for use on 1960s' era desk calculators and it has stability & accuracy …

Jan 8, 2011 · Here is a Java version which is well suited for small N and very large target sum, when complexity O(t*N) (the dynamic solution) is greater than the exponential algorithm. My …

Dec 19, 2019 · Big-O does not measure efficiency; it measures how well an algorithm scales with size (it could apply to other things than size too but that's what we likely are interested here) - …

Oct 23, 2012 · If I need the algorithm to run in milliseconds, when does A* become the most prominent choice. Not quite, it depends on a lot of things. If you have a decent heuristic …

Same core algorithm but we keep track of the top-k elements and keep m equal to the most distant element in the k-elements. Same trick applies. If the distance in any single direction is …

Oct 20, 2008 · Here's an algorithm faster than everybody else's algorithm for most cases. It's new and elegant. We spend O(n * log(n)) time building a table that will allow us to test point-in …

CastorTiu has a really nice demo solution on CodeProject, A* algorithm implementation in C#, that animates the search algorithm and allows the user to tweak a few settings. [...] …

Aug 31, 2016 · One small correction, "HS256 (HMAC with SHA-256), on the other hand, is a symmetric algorithm" - HMAC does not utilize a symmetric-key algorithm (which would allow …