How should I practice Expand Decimal Digits into Runs of Ones?

Start by reading the full statement, solve the visible examples, then compare the pattern against related ZipRecruiter onsite interview problems in FastPrep.

Is Expand Decimal Digits into Runs of Ones associated with ZipRecruiter?

FastPrep tags this as a ZipRecruiter onsite interview coding practice problem when the problem catalog has that company and stage context.

Expand Decimal Digits into Runs of Ones

ZipRecruiter● EasyNEW GRADONSITE INTERVIEW

Learn

Problem statement

Scan text from left to right. Replace each decimal digit d with exactly d copies of the character 1. Keep every nondigit character unchanged.

Each digit is interpreted independently, so 0 contributes no characters.

Function

expandDigitsToOnes(text: String) → String

Examples

Example 1

text = "a5b3de"return = "a11111b111de"

Each digit expands independently while letters remain in place.

Example 2

text = "x0y2"return = "xy11"

Zero contributes an empty run and two contributes two ones.

Constraints

0 <= text.length <= 100000
text contains ASCII letters and decimal digits.