A02 Solutions

Reference answers with reasoning. Try the ../exercises/ yourself first - the learning is in the struggle, not the answer key.

This directory has its own Makefile:

make all GPU_ARCH=gfx950      # build every solution for your GPU
make run                      # build + run all; every one must PASS
make clean

#	File	Notes
1	01_coalesce_solution.cpp	Coalesced grid-stride loop; adjacent lanes → adjacent addresses. ~5–6× BW.
2	02_bank_conflict_solution.cpp	+1 column pad → column reads hit 32 distinct banks.
3	03_hierarchy_solution.md	Full shared-mem / register / thread budget math + portability note.