2106.Maximum-Fruits-Harvested-After-at-Most-K-Steps (H) Sliding window : Distinct Characters 076.Minimum-Window-Substring (M+) 003.Longest-Substring-Without-Repeating-Character (E+) 159.Longest-Substring-with-At-Most-Two-Distinct-Characters(H-) 340.Longest-Substring-with-At-Most-K-Distinct-Char...