Prefix Sums
Prefix sums (cumulative sums) are a foundational technique for speeding up range queries. They extend beyond arrays into matrices, trees, and even XOR or product computations, forming the backbone of many algorithmic optimizations.
Prefix sums (cumulative sums) are a foundational technique for speeding up range queries. They extend beyond arrays into matrices, trees, and even XOR or product computations, forming the backbone of many algorithmic optimizations.