Problem 288. Construct a string from letters and counts

Given two input arrays like this: [5,3,1] ['a','b','c']

Output a string that contains each letter the specified number of times, e.g.:

    'aaaaabbbc'

If given an invalid input (for example, a negative number), output the string 'ERROR'.

Solve

Solution Stats

34.0% Correct | 66.0% Incorrect
Last Solution submitted on Dec 03, 2025

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error-checking strings

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