##### ###### ##### ### # # ### # # ###### ## ## ## ## ## ## ## # # # # # ## ##### #### ##### # # # # # # # #### ## # ## ## ## ## # # # # # ## ## # ###### ## ### # ### # ######
##### ###### ##### ### # # ### # # ###### ## ## ## ## ## ## ## # # # # # ## ##### #### ##### # # # # # # # #### ## # ## ## ## ## # # # # # ## ## # ###### ## ### # ### # ######
Given a string s and integer , you can replace at most characters to make any substring contain only one repeating character. Return the length of the longest such substring.
Example: For "AABABBA" and , return . Replace one A in "ABAB" to get "AAAA" or "BBBB".
