Add HLD problems (roughly sorted by difficulty)

Electron1997 · web-flow · commit 6206986ddde5 · 2025-01-27T14:49:02.000+01:00
diff --git a/src/graph/hld.md b/src/graph/hld.md
@@ -183,3 +183,8 @@ int query(int a, int b) {
 ## Practice problems
 
 - [SPOJ - QTREE - Query on a tree](https://www.spoj.com/problems/QTREE/)
+- [CSES - Path Queries II](https://cses.fi/problemset/task/2134)
+- [Codeforces - Subway Lines](https://codeforces.com/gym/101908/problem/L)
+- [Codeforces - Tree Queries](https://codeforces.com/contest/1254/problem/D)
+- [Codeforces - Tree or not Tree](https://codeforces.com/contest/117/problem/E)
+- [Codeforces - The Tree](https://codeforces.com/contest/1017/problem/G)
