How should I practice Minimum Replacements to Make Two Strings Anagrams?

Start by reading the full statement, solve the visible examples, then compare the pattern against related Bloomberg LP phone screen and onsite interview problems in FastPrep.

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Minimum Replacements to Make Two Strings Anagrams

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Problem statement

Return the minimum number of positions in first whose characters must be replaced so first and second are anagrams. Return -1 if their lengths differ.

Function

minimumAnagramReplacements(first: String, second: String) → int

Examples

Example 1

first = "bab"second = "aba"return = 1

Replacing one b with a equalizes the character counts.

Constraints

Both strings contain lowercase English letters.
Each length is at most 10^5.