longestDigitsPrefix
Given a string, output its longest prefix which contains only digits.
Example
For inputString = "123aa1", the output should be longestDigitsPrefix(inputString) = "123".
Input/Output
-
[execution time limit] 0.5 seconds
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[input] string s
Guaranteed constraints:
3 ≤ inputString.length ≤ 100. -
[output] string
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