Status: IN
Python stdlib delegation and exact integer arithmetic converge on the same goal: Counter gives exact frequencies, math.isqrt gives exact roots, set gives exact membership — the stdlib IS the exactness layer, and choosing manual implementations would compromise both idiomaticity and precision.
Stdlib abstractions inherently provide the exact semantics the repo demands
Depends on (SL): python-stdlib-preferred-over-manual-algorithms, exactness-over-performance-at-every-layer