Frequency Queries Hackerrank Solution (Interview Preparation kit)
in this video I have discussed frequency queries hackerrank solution from the hackerrank interview preparation kit.
Approach : first create two maps and in first map store the key value pair of element and its frequency and for second map you need to create a key value pair of frequency and and its occurance.
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• Hackerrank Interview Preparation Kit
0:00 Start
0:50 Problem definition
1:41 Naive approach
6:11 logic building
6:21 How update/add works(first query)
11:45 How delete works (second query)
13:37 Third query
14:19 Complete example simulation
20:20 Writing code