diff --git a/problemlist.md b/problemlist.md
index ef938e0..54dd92f 100644
--- a/problemlist.md
+++ b/problemlist.md
@@ -17,6 +17,11 @@ A little collection of interesting problems that I randomly decided to do.
 
 	Another incredibly annoying problem, beware...
 
+- [D. Counting Points]](https://codeforces.com/problemset/problem/2074/D)
+
+	I remember that I couldn't solve it before... Now it's painfully easy to do, but the
+	idea might be interesting to show in a class or something.
+
 ## Data structures
 
 - [D. Recommendations](https://codeforces.com/contest/2042/problem/D)
@@ -41,6 +46,11 @@ A little collection of interesting problems that I randomly decided to do.
 	Can be solved in two ways, but the sparse table one is interesting, although
 	the other way seems more versatile.
 
+- [A. Ntarsis' Set](https://codeforces.com/problemset/problem/1852/A)
+
+	REALLY good binary search problem, amazing to do and think about, the binary search isn't
+	obvious at all.
+
 ## Reroot
 
 - [D. Tree XOR](https://codeforces.com/problemset/problem/1882/D)