Update Extra

Ashishgup1 · web-flow · commit 02c9498546ea · 2019-08-28T20:16:58.000+05:30
diff --git a/Extra b/Extra
@@ -9,6 +9,9 @@
 -BFS
 //Problem 1 (Multiple of number not containing some digits): https://www.spoj.com/problems/MULTII/
 
+-Binary Search
+//Problem 1: https://codeforces.com/contest/1168/problem/A
+
 -Dealing with periodic repeats:
 
 //Problem 1: https://codeforces.com/problemset/problem/173/A
