20240115 Finished

src/problem/mod.rs

@@ -16,3 +16,5 @@ mod p0743_network_delay_time;
 mod p0447_number_of_boomerangs;
 mod p2085_count_common_words_with_one_occurrence;
 mod p2182_construct_string_with_repeat_limit;
+mod p83_remove_duplicates_from_sorted_list;
+mod p82_remove_duplicates_from_sorted_list_ii;

src/problem/p82_remove_duplicates_from_sorted_list_ii.rs

@@ -0,0 +1,63 @@
+/**
+ * [82] Remove Duplicates from Sorted List II
+ */
+pub struct Solution {}
+
+use crate::util::linked_list::{ListNode, to_list};
+
+// submission codes start here
+
+// 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 delete_duplicates(head: Option<Box<ListNode>>) -> Option<Box<ListNode>> {
+        let mut head = head;
+        // 创建新链表的头结点
+        let mut dummy = Box::new(ListNode::new(0));
+        let mut tail = &mut dummy;
+
+        let mut prev = None;
+
+        while let Some(mut node) = head {
+            head = node.next.take();
+
+            let now = node.val;
+
+            if head.as_ref().map_or(true, |next| next.val != now)
+                && prev.map_or(true, |pre| pre != now) {
+
+                tail.next = Some(node);
+                tail = tail.next.as_mut()?;
+            }
+
+            prev = Some(now);
+        }
+
+        dummy.next
+    }
+}
+
+// submission codes end
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_82() {
+    }
+}

src/problem/p83_remove_duplicates_from_sorted_list.rs

@@ -0,0 +1,56 @@
+/**
+ * [83] Remove Duplicates from Sorted List
+ */
+pub struct Solution {}
+
+use crate::util::linked_list::{ListNode, to_list};
+
+// submission codes start here
+
+// 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 delete_duplicates(head: Option<Box<ListNode>>) -> Option<Box<ListNode>> {
+        let mut head = head;
+        let mut now = head.as_mut();
+
+        while let Some(node) = now.take() {
+            while let Some(next) = node.next.as_mut() {
+                if node.val == next.val {
+                    node.next = next.next.take();
+                } else {
+                    break
+                }
+            }
+
+            now = node.next.as_mut();
+        }
+
+        head
+    }
+}
+
+// submission codes end
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_83() {
+    }
+}