ring, find the first non-repeating character in it and return it's index. If it doesn't exist, return -1. For example: s = "leetcode" return 0. s = "loveleetcod

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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Given a string, find the first non-repeating character in it and return it's
index. If it doesn't exist, return -1.
For example:
s = "leetcode"
return 0.
s = "loveleetcode",
return 2..

 

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