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This is the shortest way (as per my knowledge).
However, there is an error.
when [q[0] == 2], before doing cnt[freq[q[1]]]-=1, you should check if cnt[freq[q[1]]] > 0. Otherwise, you might make it negative.
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This is the shortest way (as per my knowledge). However, there is an error. when [q[0] == 2], before doing cnt[freq[q[1]]]-=1, you should check if cnt[freq[q[1]]] > 0. Otherwise, you might make it negative.