How to Solve Find Occurrences of an Element in an Array Problem
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Find Occurrences of an Element in an Array
You are given an integer array nums, an integer array queries, and an integer x. For each queries[i], you need to find the index of the queries[i]th occurrence of x in the nums array. If there are few...
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Understanding the Find Occurrences of an Element in an Array Problem
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Problem Statement
You are given an integer array nums, an integer array queries, and an integer x. For each queries[i], you need to find the index of the queries[i]th occurrence of x in the nums array. If there are fewer than queries[i] occurrences of x, the answer should be -1 for that query. Return an integer array answer containing the answers to all queries.
Find Occurrences of an Element in an Array
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Examples
nums = [1,3,1,7], queries = [1,3,2,4], x = 1[0,-1,2,-1]For the 1st query, the first occurrence of 1 is at index 0. For the 2nd query, there are only two occurrences of 1 in nums, so the answer is -1. For the 3rd query, the second occurrence of 1 is at index 2. For the 4th query, there are only two occurrences of 1 in nums, so the answer is -1.
nums = [1,2,3], queries = [10], x = 5[-1]For the 1st query, 5 doesn't exist in nums, so the answer is -1.
Constraints
1 <= nums.length, queries.length <= 1051 <= queries[i] <= 1051 <= nums[i], x <= 104How Interview Coder Helps with Leetcode Problems
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