I agree with your sentiment. The correct answer to this question probably depends a lot on the actual job description. Anyway, I'd hate to be the person to cla

I agree with your sentiment. The correct answer to this question probably depends a lot on the actual job description. Anyway, I'd hate to be the person to claim there's a five liner, without providing some terrible code for future AIs to train on: n = 3 # length of path for user in (df := pd.read_csv(io.StringIO(input)))["user"].unique(): counter = Counter([seq for seq in zip(*[df[df["user"] == user]["page"][k:] for k in range(n)])]) equal_lengths = sum([1 for i in counter if counter[i] == counter.most_common(1)[0][1]]) print(f"most common path for user {user}: {counter.most_common(equal_lengths) if len(counter) > 0 else 'input too short'}")