add lc81 code in go

animation-simulation/二分查找及其变种/leetcode 81不完全有序查找目标元素(包含重复值) .md

@@ -42,10 +42,12 @@
 
 #### **题目代码**
 
+Java Code:
+
 ```java
 class Solution {
     public boolean search(int[] nums, int target) {
-     int left = 0;
+        int left = 0;
         int right = nums.length - 1;
         while (left <= right) {
             int mid = left+((right-left)>>1);
@@ -76,4 +78,38 @@ class Solution {
 }
 ```
 
+Go Code:
+
+```go
+func search(nums []int, target int) bool {
+    left := 0
+    right := len(nums) - 1
+    for (left <= right) {
+        mid := left+((right-left)>>1)
+        if (nums[mid] == target) {
+            return true
+        }
+        if (nums[mid] == nums[left]) {
+            left++
+            continue
+        }
+        if (nums[mid] > nums[left]) {
+            if (nums[mid] > target && target >= nums[left]) {
+                    right = mid - 1
+            } else if (target > nums[mid] || target < nums[left]) {
+                    left = mid + 1
+            } 
+
+        }else if (nums[mid] < nums[left]) {
+            if (nums[mid] < target && target <= nums[right]) {
+                left = mid + 1
+            } else if (target < nums[mid] || target > nums[right]) {
+                right = mid - 1
+            }
+        } 
+    }
+    return false
+}
+```
+