feat: add rust solution to lc problem: No.0086 (#1655)

No.0086.Partition List

Author: poltao

solution/0000-0099/0086.Partition List/README.md

@@ -214,6 +214,47 @@ var partition = function (head, x) {
 };
 ```
 
+### **Rust**
+
+```rust
+// Definition for singly-linked list.
+// #[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
+//     }
+//   }
+// }
+impl Solution {
+    pub fn partition(head: Option<Box<ListNode>>, x: i32) -> Option<Box<ListNode>> {
+        let mut head = head;
+        let mut d1 = Some(Box::new(ListNode::new(0)));
+        let mut d2 = Some(Box::new(ListNode::new(0)));
+        let (mut t1, mut t2) = (&mut d1, &mut d2);
+        while let Some(mut node) = head {
+            head = node.next.take();
+            if node.val < x {
+                t1.as_mut().unwrap().next = Some(node);
+                t1 = &mut t1.as_mut().unwrap().next;
+            } else {
+                t2.as_mut().unwrap().next = Some(node);
+                t2 = &mut t2.as_mut().unwrap().next;
+            }
+        }
+        t1.as_mut().unwrap().next = d2.unwrap().next;
+        d1.unwrap().next
+    }
+}
+```
+
 ### **...**
 
 ```

solution/0000-0099/0086.Partition List/README_EN.md

@@ -198,6 +198,47 @@ var partition = function (head, x) {
 };
 ```
 
+### **Rust**
+
+```rust
+// Definition for singly-linked list.
+// #[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
+//     }
+//   }
+// }
+impl Solution {
+    pub fn partition(head: Option<Box<ListNode>>, x: i32) -> Option<Box<ListNode>> {
+        let mut head = head;
+        let mut d1 = Some(Box::new(ListNode::new(0)));
+        let mut d2 = Some(Box::new(ListNode::new(0)));
+        let (mut t1, mut t2) = (&mut d1, &mut d2);
+        while let Some(mut node) = head {
+            head = node.next.take();
+            if node.val < x {
+                t1.as_mut().unwrap().next = Some(node);
+                t1 = &mut t1.as_mut().unwrap().next;
+            } else {
+                t2.as_mut().unwrap().next = Some(node);
+                t2 = &mut t2.as_mut().unwrap().next;
+            }
+        }
+        t1.as_mut().unwrap().next = d2.unwrap().next;
+        d1.unwrap().next
+    }
+}
+```
+
 ### **...**
 
 ```

solution/0000-0099/0086.Partition List/Solution.rs

@@ -0,0 +1,36 @@
+// Definition for singly-linked list.
+// #[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
+//     }
+//   }
+// }
+impl Solution {
+    pub fn partition(head: Option<Box<ListNode>>, x: i32) -> Option<Box<ListNode>> {
+        let mut head = head;
+        let mut d1 = Some(Box::new(ListNode::new(0)));
+        let mut d2 = Some(Box::new(ListNode::new(0)));
+        let (mut t1, mut t2) = (&mut d1, &mut d2);
+        while let Some(mut node) = head {
+            head = node.next.take();
+            if node.val < x {
+                t1.as_mut().unwrap().next = Some(node);
+                t1 = &mut t1.as_mut().unwrap().next;
+            } else {
+                t2.as_mut().unwrap().next = Some(node);
+                t2 = &mut t2.as_mut().unwrap().next;
+            }
+        }
+        t1.as_mut().unwrap().next = d2.unwrap().next;
+        d1.unwrap().next
+    }
+}