First Repeated Character
First Repeated Character
EasyHash Maps22% accepted
Given a string, find the first character that appears more than once. Scan the string left to right; the first character you encounter that you have seen before is your answer. Print it. If no character repeats, print -1.
Approach
Given a string S, print the first character that appears more than once, or -1 if none repeats.
Input
aabbc
Output
a
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