I think you are right. Let me put it in a formal way so that my understanding is clear. So we are grouping in "tt", "tl" and "ll" groups. If there are p "tl"/"ll" groups whose answer include a "no" then we put them aside at the end after we found out one truth teller and then with 'p' questions can figure out all the truth tellers/liar in those groups. So one "tl"/"ll" group having a "NO" answer will at end contribute one question. But instead if it was a group which answered "Yes/Yes" then one person (say P) from it would have gone to second iteration. P would have been paired up with someone and asked one question at least. So the original group in which P was present will contribute one question anyway. This implies that total questions will be 198 only.
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