Update Day18.cpp

israkul9 · web-flow · commit 2b197ca8838b · 2020-05-18T17:30:47.000+06:00
diff --git a/Day18.cpp b/Day18.cpp
@@ -1,4 +1,8 @@
 
+
+// using slidding window technique 
+// https://www.youtube.com/watch?v=MPtX8pGYHCs 
+
 class Solution {
 public:
     bool checkInclusion(string patt, string original) {
