@@ -0,0 +1,172 @@
+/*  159 Longest Substring with at Most Two Distinct Characters%0D%0A */%0D%0A%0D%0Apublic class Solution %7B%0D%0A  public int lengthOfLongestSubstringTwoDistinct(String s) %7B%0D%0A    %0D%0A  %7D%0D%0A%7D%0D%0A

add 159