Segment Trees are data structures that let you easily find the minimum, maximum, or sum over a given subrange of a larger range.
I've created a tutorial explaining how segment trees work and the process of building/updating/querying one here.
This repository contains a C++ class that implements a segment tree for a minimum (Range Minimum Query) example.
Please note that I've intentionally left the code unoptimized for the reader to make better, as this code is meant to be easily understandable to the viewer, not necessarily the most efficient implementation.
The segment tree code exists as a class in
segment-tree.hpp. The class
is encapsulated within a namespace of
srcmake to avoid any collisions
with another library's segment tree.
(I've also bundled the header file with the cpp file because realistically when using a segment tree in an algorithm competition, we just want to be able to copy and paste the entire thing without worrying about eloquent file structures.)
main.cpp has a single main function that calls the segment-tree class with
some example queries.
makefile will compile the project with C++14 (the version was chosen arbitrarily,
we're not really using any special language features).
On Linux/Mac, as long as you have GCC, the following command will compile and run the project.
This code is licensed under the MIT License.