Add contest data for prelims

Author: mpsijm

content/_index.md

@@ -13,3 +13,35 @@ participate in the [NWERC 2025](https://2025.nwerc.eu/).
 
 The 2025 edition of the BAPC will be held on the 25th of October, 2025.
 The contest will be held on the campus of the Delft University of Technology.
+
+{{% row %}}
+{{% column %}}
+
+## Contest material
+
+To be added after the BAPC.
+<!--
+- [Photos](/photos)
+- [Final Standings](/main/scoreboard) ([Spectators](/main/scoreboard/spectators.html))
+- [Problem Set (pdf)](/main/problem-set.pdf)
+- [Solution Slides (pdf)](/main/solutions.pdf)
+- [Packaged Problems (.zip, ???MB)](/main/solutions.zip)
+- [Contest Livestream](https://www.youtube.com/watch?v=Ho3z9XpJ5AA)
+- [Award Ceremony Livestream](https://www.youtube.com/watch?v=Z1HO34X9qSA)
+-->
+
+{{% /column %}}
+{{% column %}}
+
+## Preliminaries material
+
+The merged scoreboard for all preliminaries will be added soon.
+<!--
+- [Merged Scoreboard](/prelims/scoreboard)
+-->
+- [Problem Set (pdf)](/prelims/problem-set.pdf)
+- [Solution Slides (pdf)](/prelims/solutions.pdf)
+- [Packaged Problems (.zip, 450MB)](/prelims/solutions.zip)
+
+{{% /column %}}
+{{% /row %}}

static/prelims/problem-set.pdf

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:d913ed9a43d98fb7378dff9ce10bb30b30da5b8ad855d37a64f851c49a2063b9
+size 450081814