diff --git a/.gitea/workflows/build_and_run.yml b/.gitea/workflows/build_and_run.yml
index 8843dc1..455ab3a 100644
--- a/.gitea/workflows/build_and_run.yml
+++ b/.gitea/workflows/build_and_run.yml
@@ -17,6 +17,10 @@ jobs:
       - name: Check out repository code
         uses: actions/checkout@v4
       - name: Run challenge
+        env:
+          DAY_FOLDER: day${{ matrix.day_number }}
+          INPUT_BASE64: ${{ vars[format('INPUT_DAY{0}', matrix.day_number) }}
         run: |
-          cd day${{ matrix.day_number }}
-          cargo run --release ./input
+          echo $INPUT_BASE64 | base64 --decode > /tmp/input
+          cd $DAY_FOLDER
+          cargo run --release /tmp/input