diff --git a/.gitignore b/.gitignore
index a5b1113..77b3a40 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
+.vscode
 .gradle
 **/build/
 !src/**/build/
@@ -19,3 +20,22 @@ gradle-app.setting
 .project
 # JDT-specific (Eclipse Java Development Tools)
 .classpath
+
+# Compiled class file
+*.class
+
+# Log file
+*.log
+
+# Package Files #
+*.jar
+*.war
+*.nar
+*.ear
+*.zip
+*.tar.gz
+*.rar
+
+# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
+hs_err_pid*
+replay_pid*
diff --git a/doc/answers.md b/doc/answers.md
new file mode 100644
index 0000000..e69de29