1 files changed, 46 insertions, 0 deletions
diff --git a/add-two-numbers/src/main.rs b/add-two-numbers/src/main.rs
new file mode 100644
index 0000000..3a9abe9
--- /dev/null
+++ b/add-two-numbers/src/main.rs
@@ -0,0 +1,46 @@
+fn main() {
+    println!("Hello, world!");
+}
+
+#[derive(PartialEq, Eq, Clone, Debug)]
+pub struct ListNode {
+  pub val: i32,
+  pub next: Option<Box<ListNode>>
+}
+
+impl ListNode {
+  #[inline]
+  fn new(val: i32) -> Self {
+    ListNode {
+      next: None,
+      val
+    }
+  }
+}
+// Comprehensive 3ms Recursive 
+
+struct Solution {}
+impl Default for ListNode {
+    fn default() -> Self {
+        ListNode::new(0)
+    }
+}
+
+impl Solution {
+    pub fn add_two_numbers(l1: Option<Box<ListNode>>, l2: Option<Box<ListNode>>) -> Option<Box<ListNode>> {
+        Solution::add_two_numbers_with_carry(l1, l2, 0)
+    }
+    pub fn add_two_numbers_with_carry(l1: Option<Box<ListNode>>, l2: Option<Box<ListNode>>, carry: i32) -> Option<Box<ListNode>> {
+        if l1.is_none() && l2.is_none() && carry == 0 {return None;}
+        let a = l1.unwrap_or_default();
+        let b = l2.unwrap_or_default();        
+        let sum = a.val + b.val + carry;
+
+        let result = ListNode {
+            val: sum % 10,
+            next: Solution::add_two_numbers_with_carry(a.next, b.next, sum / 10)
+        };
+        Some(Box::new(result))
+    }
+}
+