How should I practice Remove Letter to Equalize Frequency?

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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Remove Letter to Equalize Frequency

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Problem statement

Return whether deleting exactly one character occurrence from lowercase string word can make every remaining character have the same positive frequency.

Function

equalFrequency(word: String) → boolean

Examples

Example 1

word = "abcc"return = true

Remove one c, leaving every character once.

Example 2

word = "aazz"return = false

One deletion leaves frequencies 1 and 2.

Constraints

2 <= word.length <= 10^5.
word contains lowercase English letters.