What is the meaning of maximum length substring of equal characters.?

#1

What is the meaning of maximum length substring of equal characters. ?

#2

It means that the longest continuous part of a string that has equal number of a’s and b’s
Like aabbaa
Here abba and aabb (both) are the longest continuous parts which have equal number of a’s and b’s

#3

bbaa is another longest continuous part that has equal number of a’s and b’s

#4

What is the use of k then ??

#5

k is a number. We can change a maximum of k characters (from a to b OR from b to A) in our string.
After changing some or zero characters (at max k) we have to find the longest continuous sub string which have equal number of a’s and b’s.
Example
k = 3 and string is aabbaabbaa
if I don’t change anything length of longest continuous substring is 8 = bbaabbaa
If I change ‘a’ at index 0 to ‘b’ then maximum length changes to 10 = babbaabbaa

So in this question you need to change some characters (possibly zero and max k) and find the length of the longest continuous substring that is formed.

#6

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