Number of sub-strings with each character occurring even times

This article discusses different algorithmic approach which we can use to find number of sub-strings with each character in it occurring even number times for a given string.

Table of ContentsPre-requisitesNaive methodNaive method algorithmNaive method C codeQuestionEfficient approachEfficient approach algorithmEfficient approach C codeComplexity Pre-requisites

Arrays, Strings in C, Generate all sub-strings of a string, Bitwise operations, Dictionary or key-value representatio...