Add problem 0482: License Key Formatting

src/problem_0482_license_key_formatting/iterative.rs

@@ -0,0 +1,32 @@
+pub struct Solution;
+
+impl Solution {
+    pub fn license_key_formatting(s: String, k: i32) -> String {
+        let k = k as usize;
+        let s = s
+            .chars()
+            .filter(|&x| (x != '-'))
+            .map(|x| x.to_ascii_uppercase())
+            .collect::<String>();
+        s.as_bytes()
+            .rchunks(k)
+            .rev()
+            .map(|x| String::from_utf8_lossy(x))
+            .collect::<Vec<_>>()
+            .join("-")
+    }
+}
+
+impl super::Solution for Solution {
+    fn license_key_formatting(s: String, k: i32) -> String {
+        Self::license_key_formatting(s, k)
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    #[test]
+    fn test_solution() {
+        super::super::tests::run::<super::Solution>();
+    }
+}

src/problem_0482_license_key_formatting/mod.rs

@@ -0,0 +1,22 @@
+pub mod iterative;
+
+pub trait Solution {
+    fn license_key_formatting(s: String, k: i32) -> String;
+}
+
+#[cfg(test)]
+mod tests {
+    use super::Solution;
+
+    pub fn run<S: Solution>() {
+        let test_cases = [
+            (("5F3Z-2e-9-w", 4), "5F3Z-2E9W"),
+            (("2-5g-3-J", 2), "2-5G-3J"),
+            (("---", 3), ""),
+        ];
+
+        for ((s, k), expected) in test_cases {
+            assert_eq!(S::license_key_formatting(s.to_string(), k), expected);
+        }
+    }
+}