diff --git a/.gitignore b/.gitignore
index 0ab1c23..3ac6e56 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,4 @@
 .idea/
-*.pdf
 
 # Byte-compiled / optimized / DLL files
 __pycache__/
diff --git a/app/examples/problems-answers.pdf b/app/examples/problems-answers.pdf
new file mode 100644
index 0000000..b1a7172
Binary files /dev/null and b/app/examples/problems-answers.pdf differ
diff --git a/app/examples/problems.pdf b/app/examples/problems.pdf
new file mode 100644
index 0000000..5654b27
Binary files /dev/null and b/app/examples/problems.pdf differ