Top k most frequent numbers

[dishask99 (Disha Singla)]

I am not able to understand how to solve this problem and also how can we use heap in this?
Can anybody please explain the logic…

[pratyush63 (Pratyush Kumar)]

Top k most frequent in a stream of integers

I know how to do this question using hashmap but please guide me on how to do this question using heaps.

Please refer this. I have explained the approach there.