Leetcode 2080. Range Frequency Queries
Preprocess the array to support fast count queries that return how many times a given value appears in arr[left..right]; a common approach stores each value's sorted list of indices and uses binary search to count indices in the range, handling up to 10^5 elements and queries efficiently.
Question Timeline
See when this question was last asked and where, including any notes left by other candidates.
0
Hello Interview Premium
Your account is free and you can post anonymously if you choose.