How to Solve Most Frequent Number Following Key In an Array Problem
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Most Frequent Number Following Key In an Array
You are given a 0-indexed integer array nums. You are also given an integer key, which is present in nums. For every unique integer target in nums, count the number of times target immediately follows...
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Understanding the Most Frequent Number Following Key In an Array Problem
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Problem Statement
You are given a 0-indexed integer array nums. You are also given an integer key, which is present in nums. For every unique integer target in nums, count the number of times target immediately follows an occurrence of key in nums. In other words, count the number of indices i such that: 0 <= i <= nums.length - 2, nums[i] == key and, nums[i + 1] == target. Return the target with the maximum count. The test cases will be generated such that the target with maximum count is unique.
Most Frequent Number Following Key In an Array
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Examples
nums = [1,100,200,1,100], key = 1100For target = 100, there are 2 occurrences at indices 1 and 4 which follow an occurrence of key. No other integers follow an occurrence of key, so we return 100.
nums = [2,2,2,2,3], key = 22For target = 2, there are 3 occurrences at indices 1, 2, and 3 which follow an occurrence of key. For target = 3, there is only one occurrence at index 4 which follows an occurrence of key. target = 2 has the maximum number of occurrences following an occurrence of key, so we return 2.
Constraints
2 <= nums.length <= 10001 <= nums[i] <= 1000The test cases will be generated such that the answer is unique.How Interview Coder Helps with Leetcode Problems
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