[FIX] CI

Author: hyfi06

.github/workflows/main.yml

@@ -0,0 +1,13 @@
+name: Zero and one parents problem
+
+on: [pull_request]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v1
+    - name: Run Jest
+      uses: stefanoeb/jest-action@1.0.2