First Unique Character in a String
For business inquiries email [email protected] One of Amazon's most commonly asked interview questions according to LeetCode.
Coding Interviews First Unique Character in a String (LeetCode) question and explanation.
This interview question is commonly asked by the following companies: Amazon, Facebook, Google, Bloomberg Microsoft, Goldman Sachs, Apple, Yahoo.
Problem description: Given a string, find the first non-repeating character in it and return it's index. If it doesn't exist, return -1.
Examples:
s = "leetcode"
return 0.
s = "loveleetcode",
return 2.
Note: You may assume the string contain only lowercase letters.
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