impl solution polindrome number

leetcode/src/solutions/palindrome_number.rs

@@ -31,7 +31,33 @@ impl Solution for SolutionImpl {
 }
 
 impl SolutionImpl {
-    pub fn is_palindrome(x: i32) -> bool {
-        todo!()
+    pub fn is_palindrome(mut x: i32) -> bool {
+        if x < 0 {
+            false
+        } else if x < 10 {
+            true
+        } else {
+            let mut v = Vec::new();
+            while x > 0 {
+                let residue = x % 10;
+                x /= 10;
+
+                v.push(residue);
+            }
+
+            let mut start = 0;
+            let mut end = v.len() - 1;
+
+            while start < end {
+                if v[start] != v[end] {
+                    return false;
+                }
+
+                start += 1;
+                end -= 1;
+            }
+
+            true
+        }
     }
 }

runtime/src/registration.rs

@@ -30,6 +30,7 @@ pub fn register_all(handle: ContainerHandle) -> anyhow::Result<()> {
     handle.register_solution(|_| solutions::string_to_integer::SolutionImpl)?;
 
     handle.register_problem(|_| problems::palindrome_number::ProblemImpl)?;
+    handle.register_solution(|_| solutions::palindrome_number::SolutionImpl)?;
 
     Ok(())
 }