added problem 83

Author: SHA65536

problems/problem0083/remove_list_dupes.go

@@ -0,0 +1,21 @@
+package problem0083
+
+import . "leetcodedaily/helpers/listnode"
+
+/*
+Given the head of a sorted linked list, delete all duplicates such that each element appears only once. Return the linked list sorted as well.
+*/
+
+func deleteDuplicates(head *ListNode) *ListNode {
+	if head == nil {
+		return nil
+	}
+	for cur := head; cur.Next != nil; {
+		if cur.Val == cur.Next.Val {
+			cur.Next = cur.Next.Next
+		} else {
+			cur = cur.Next
+		}
+	}
+	return head
+}

problems/problem0083/remove_list_dupes_test.go

@@ -0,0 +1,32 @@
+package problem0083
+
+import (
+	"fmt"
+	. "leetcodedaily/helpers/listnode"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+type Result struct {
+	Input    *ListNode
+	Expected *ListNode
+}
+
+var Results = []Result{
+	{MakeListNode(1, 1, 2), MakeListNode(1, 2)},
+	{MakeListNode(1, 1, 2, 3, 3), MakeListNode(1, 2, 3)},
+	{MakeListNode(1), MakeListNode(1)},
+	{MakeListNode(), MakeListNode()},
+	{MakeListNode(1, 2), MakeListNode(1, 2)},
+}
+
+func TestRemoveListDuplicates(t *testing.T) {
+	assert := assert.New(t)
+
+	for _, res := range Results {
+		want := res.Expected
+		got := deleteDuplicates(res.Input)
+		assert.Equal(want, got, fmt.Sprintf("%+v", res))
+	}
+}

readme.md

@@ -57,6 +57,7 @@ Each problem is in it's own directory, with test files. There are helper package
 | 0076 | [Minimum Window Substring](https://leetcode.com/problems/minimum-window-substring) | [My Solution](./problems/problem0076) | ✅ |
 | 0077 | [Combinations](https://leetcode.com/problems/combinations) | [My Solution](./problems/problem0077) | ✅ |
 | 0079 | [Word Search](https://leetcode.com/problems/word-search) | [My Solution](./problems/problem0079) | ✅ |
+| 0083 | [Remove Duplicates from Sorted List](https://leetcode.com/problems/remove-duplicates-from-sorted-list) | [My Solution](./problems/problem0083) | ✅ |
 | 0086 | [Partition List](https://leetcode.com/problems/partition-list) | [My Solution](./problems/problem0086) | ✅ |
 | 0088 | [Merge Sorted Array](https://leetcode.com/problems/merge-sorted-array) | [My Solution](./problems/problem0088) | ✅ |
 | 0091 | [Decode Ways](https://leetcode.com/problems/decode-ways) | [My Solution](./problems/problem0091) | ✅ |