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valentines-day/HINTS.md

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+# Hints
+
+## 1. Define the approval
+
+- Custom types can be defined using the `pub type Name { Variant1 }` syntax.
+
+## 4. Define the activity
+
+- Custom types containing data can be defined using the `pub type Name { Variant1(SomeType) }` syntax.
+
+## 5. Rate the activity
+
+- Custom type variants can be pattern matched on using case expressions.
+- If you want to add an additional condition to a pattern, you can add a guard to the pattern using the `if` keyword.