Verification #28 · 2026-10-21 · Associative arrays · Easy · about 10 min

The histogram walk that skips the first address

addr_hist counts how often each address was seen, in the associative array cnt (address → count). Two methods walk it:

• hottest(addr, n) returns the address seen most often and its count. If several addresses tie, the lowest one wins. It returns 1, or 0 with the outputs left alone if nothing has been seen.
• prune(min) removes every address seen fewer than min times and returns how many it removed.

Run adds a few addresses. hottest picks the wrong one, and prune leaves one behind. Fix hist.sv.

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