更新README.md

Author: aQua

README.md

@@ -1,15 +1,15 @@
 # [LeetCode](https://leetcode.com)习题的Golang解答。
 [![LeetCode](https://img.shields.io/badge/LeetCode-aQuaYi-blue.svg)](https://leetcode.com/aQuaYi/)
-[![LeetCode Ranking](https://img.shields.io/badge/Ranking-64789-blue.svg)](https://leetcode.com/aQuaYi/)
+[![LeetCode Ranking](https://img.shields.io/badge/Ranking-62772-blue.svg)](https://leetcode.com/aQuaYi/)
 [![Build Status](https://www.travis-ci.org/aQuaYi/LeetCode-in-Golang.svg?branch=master)](https://www.travis-ci.org/aQuaYi/LeetCode-in-Golang)
 [![codecov](https://codecov.io/gh/aQuaYi/LeetCode-in-Golang/branch/master/graph/badge.svg)](https://codecov.io/gh/aQuaYi/LeetCode-in-Golang)
 
 ## 答题进度：22%
 |Category|Easy|Medium|Hard|Total|
 |:--|:--:|:--:|:--:|:--:|
-|**Algorithms**|38 / 142|54 / 246|15 / 92|107 / 480|
+|**Algorithms**|38 / 142|54 / 246|16 / 92|108 / 480|
 |**Draft**|0 / 1|0 / 4|0 / 0|0 / 5|
-|**Total**|38 / 143|54 / 250|15 / 92|107 / 485|
+|**Total**|38 / 143|54 / 250|16 / 92|108 / 485|
 
 > 只统计了免费题 
 ## 参考解答
@@ -110,6 +110,7 @@
 |287|[Find the Duplicate Number](./Algorithms/0287.find-the-duplicate-number)|☆ ☆|43%|❤|
 |289|[Game of Life](./Algorithms/0289.game-of-life)|☆ ☆|36%|❤|
 |380|[Insert Delete GetRandom O(1)](./Algorithms/0380.insert-delete-getrandom-o1)|☆ ☆|39%|❤|
+|381|[Insert Delete GetRandom O(1) - Duplicates allowed](./Algorithms/0381.insert-delete-getrandom-o1-duplicates-allowed)|☆ ☆ ☆|28%|❤|
 |414|[Third Maximum Number](./Algorithms/0414.third-maximum-number)|☆|27%||
 |448|[Find All Numbers Disappeared in an Array](./Algorithms/0448.find-all-numbers-disappeared-in-an-array)|☆|51%||
 |485|[Max Consecutive Ones](./Algorithms/0485.max-consecutive-ones)|☆|54%||