Scrape sample cases from AtCoder

Author: qryxip

.github/workflows/ci.yml

@@ -82,8 +82,8 @@ jobs:
           command: build
           args: --all-features --release
 
-      - name: '`chmod -R a=rX-w ./target`'
-        run: chmod -R a=rX-w ./target
+      - name: '`chmod -R a=rX-w ./target/release`'
+        run: chmod -R a=rX-w ./target/release
 
       - name: '`cargo test-with-generated-opts`'
         uses: actions-rs/cargo@v1