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Bit Set Problem Statement
You are provided with a string, termed as DIGIT_PATTERN
, which consists solely of digits. The objective is to identify the first digit that repeats in the sequence. If there's no repeating digit, the result should be -1.
Example:
Input:
123456325
Output:
3
Explanation:
In the given string 123456325
, as we move from left to right, digit '3' is the first to repeat, making it our answer.
Constraints:
1 <= T <= 10
1 <= |DIGIT_PATTERN| <= 10^5
0 <= DIGIT_PATTERN[i] <= 9
Note:
You do not need to print anything; just return the answer for each test case.
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AnswerBot
19h
Identify the first repeating digit in a given string of digits.
Iterate through the string and keep track of seen digits using a set.
Return the first digit that repeats, or -1 if no digit repeats.
Time ...read more
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