Add remove-duplicates-from-sorted-list and remove-duplicates-from-sorted-list-ii

Author: Gituser143

Easy/remove-duplicates-from-sorted-list.md

@@ -0,0 +1,33 @@
+Code
+====
+
+```go
+/**
+ * Definition for singly-linked list.
+ * type ListNode struct {
+ *     Val int
+ *     Next *ListNode
+ * }
+ */
+func deleteDuplicates(head *ListNode) *ListNode {
+	curr := head
+	temp := curr
+
+	for temp != nil {
+		for temp != nil && temp.Val == curr.Val {
+			temp = temp.Next
+		}
+		curr.Next = temp
+		curr = temp
+	}
+
+	return head
+}
+```
+
+Solution in mind
+================
+
+-	Make use of a temp pointer to skip duplicate nodes.
+
+-	After skipping of nodes, link the previous pointer to it's new node.

Medium/remove-duplicates-from-sorted-list-ii.md

@@ -0,0 +1,44 @@
+Code
+====
+
+```go
+/**
+ * Definition for singly-linked list.
+ * type ListNode struct {
+ *     Val int
+ *     Next *ListNode
+ * }
+ */
+func deleteDuplicates(head *ListNode) *ListNode {
+
+	if head == nil || head.Next == nil {
+		return head
+	}
+
+	sentinal := &ListNode{-1, head}
+
+	prev := sentinal
+	curr := head
+
+	for curr != nil {
+
+		if curr.Next != nil && curr.Val == curr.Next.Val {
+			for curr.Next != nil && curr.Val == curr.Next.Val {
+				curr = curr.Next
+			}
+			prev.Next = curr.Next
+		} else {
+			prev = prev.Next
+		}
+
+		curr = curr.Next
+	}
+
+	return sentinal.Next
+}
+```
+
+Solution in mind
+================
+
+-	Solution as described [here](https://leetcode.com/problems/remove-duplicates-from-sorted-list-ii/solution/)

README.md

@@ -5,7 +5,7 @@ My collection of leet code problems solved in GoLang!
 
 | [Easy](#easy) | [Medium](#medium) | [Hard](#hard) |
 |---------------|-------------------|---------------|
-| 35            | 60                | 10            |
+| 36            | 62                | 10            |
 
 Problems finished
 =================
@@ -83,6 +83,8 @@ Easy
 
 -	[squares-of-a-sorted-array](Medium/squares-of-a-sorted-array.md)
 
+-	[remove-duplicates-from-sorted-list](Medium/remove-duplicates-from-sorted-list.md)
+
 Medium
 ------
 
@@ -208,6 +210,8 @@ Medium
 
 -	[game-of-life](Medium/game-of-life.md)
 
+-	[remove-duplicates-from-sorted-list-ii](Medium/remove-duplicates-from-sorted-list-ii.md)
+
 Hard
 ----