Given an input string, print the index of the first character in the string that does not occur multiple times in the string. If all characters occur multiple times, print "-1". For example, if the user inputs "anac102", your code should print 1 because the first non-repeating character is "s".

C++ Programming: From Problem Analysis to Program Design
8th Edition
ISBN:9781337102087
Author:D. S. Malik
Publisher:D. S. Malik
Chapter7: User-defined Simple Data Types, Namespaces, And The String Type
Section: Chapter Questions
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Problem Statement

Given an input string, print the index of the first character in the string that does not occur multiple times in the string. If all characters occur multiple times, print "-1".

For example, if the user inputs "anac102", your code should print 1 because the first non-repeating character is "s".

Sample Input

asac102

Sample Output

1

Sample Input

bobo

Sample Output

-1

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