add the from trait challenge solution

Rust/rustifinity/challenges/the-from-trait.rs

@@ -0,0 +1,31 @@
+pub struct Minutes(pub i32);
+pub struct Hours(pub i32);
+pub struct Days(pub i32);
+
+impl From<Minutes> for Hours {
+    fn from(minutes: Minutes) -> Hours {
+        // Implement the minute to hour conversion here
+        Hours(minutes.0 / 60)
+    }
+}
+
+// TODO: implement from hours to days
+impl From<Hours> for Days {
+    fn from(hours: Hours) -> Days {
+        Days(hours.0 / 24)
+    }
+}
+
+// TODO: implement from minutes to days
+impl From<Minutes> for Days {
+    fn from(minutes: Minutes) -> Days {
+        Days(minutes.0 / (24 * 60))
+    }
+}
+
+// TODO: implement from days to hours
+impl From<Days> for Hours {
+    fn from(days: Days) -> Hours {
+        Hours(days.0 * 24)
+    }
+}