Didnt get the queestion

#1

I am not able to understand the problem statement

#2

You have to print the frequent numbers in the stream
Input:
1
5 2
5 1 3 5 2

5 comes : print( { 5 } )
1 comes : print( { 1,5 } )
3 comes : print( { 1,3 } ) , all three have same frequency so taking smaller 2.
5 comes : print( { 5,1 } ) , now 5 has max frequency.
2 comes : print( { 5,1 } )

Final output : 5, 1 5, 1 3, 5 1, 5 1.

Top k most frequent number in a stream
#3

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