diff --git a/Makefile b/Makefile
index 9989e8f0d..a5199ea07 100644
--- a/Makefile
+++ b/Makefile
@@ -10,3 +10,6 @@ update:
 	leetcode helper
 	leetcode tag
 	leetcode description
+
+build:
+	CGO_ENABLED=0 GOOS=windows GOARCH=amd64 go build
diff --git a/problems/longest-substring-with-at-most-two-distinct-characters/README.md b/problems/longest-substring-with-at-most-two-distinct-characters/README.md
index af08116d0..d182151e2 100644
--- a/problems/longest-substring-with-at-most-two-distinct-characters/README.md
+++ b/problems/longest-substring-with-at-most-two-distinct-characters/README.md
@@ -31,8 +31,10 @@
   [[Hash Table](https://github.com/openset/leetcode/tree/master/tag/hash-table/README.md)]
   [[Two Pointers](https://github.com/openset/leetcode/tree/master/tag/two-pointers/README.md)]
   [[String](https://github.com/openset/leetcode/tree/master/tag/string/README.md)]
+  [[Sliding Window](https://github.com/openset/leetcode/tree/master/tag/sliding-window/README.md)]
 
 ### Similar Questions
   1. [Longest Substring Without Repeating Characters](https://github.com/openset/leetcode/tree/master/problems/longest-substring-without-repeating-characters) (Medium)
   1. [Sliding Window Maximum](https://github.com/openset/leetcode/tree/master/problems/sliding-window-maximum) (Hard)
   1. [Longest Substring with At Most K Distinct Characters](https://github.com/openset/leetcode/tree/master/problems/longest-substring-with-at-most-k-distinct-characters) (Hard)
+  1. [Subarrays with K Different Integers](https://github.com/openset/leetcode/tree/master/problems/subarrays-with-k-different-integers) (Hard)