feat: update lc problems

Author: yanglbme

solution/CONTEST_README.md

@@ -2095,6 +2095,7 @@ comments: true
 
 - [1812. 判断国际象棋棋盘中一个格子的颜色](/solution/1800-1899/1812.Determine%20Color%20of%20a%20Chessboard%20Square/README.md)
 - [1813. 句子相似性 III](/solution/1800-1899/1813.Sentence%20Similarity%20III/README.md)
+- [1814. 统计一个数组中好对子的数目](/solution/1800-1899/1814.Count%20Nice%20Pairs%20in%20an%20Array/README.md)
 - [1815. 得到新鲜甜甜圈的最多组数](/solution/1800-1899/1815.Maximum%20Number%20of%20Groups%20Getting%20Fresh%20Donuts/README.md)
 
 #### 第 234 场周赛(2021-03-28 10:30, 90 分钟) 参赛人数 4998

solution/CONTEST_README_EN.md

@@ -2098,6 +2098,7 @@ If you want to estimate your score changes after the contest ends, you can visit
 
 - [1812. Determine Color of a Chessboard Square](/solution/1800-1899/1812.Determine%20Color%20of%20a%20Chessboard%20Square/README_EN.md)
 - [1813. Sentence Similarity III](/solution/1800-1899/1813.Sentence%20Similarity%20III/README_EN.md)
+- [1814. Count Nice Pairs in an Array](/solution/1800-1899/1814.Count%20Nice%20Pairs%20in%20an%20Array/README_EN.md)
 - [1815. Maximum Number of Groups Getting Fresh Donuts](/solution/1800-1899/1815.Maximum%20Number%20of%20Groups%20Getting%20Fresh%20Donuts/README_EN.md)
 
 #### Weekly Contest 234

solution/README.md

@@ -1824,6 +1824,7 @@
 |  1811  |  [寻找面试候选人](/solution/1800-1899/1811.Find%20Interview%20Candidates/README.md)  |  `数据库`  |  中等  |  🔒  |
 |  1812  |  [判断国际象棋棋盘中一个格子的颜色](/solution/1800-1899/1812.Determine%20Color%20of%20a%20Chessboard%20Square/README.md)  |  `数学`,`字符串`  |  简单  |  第 49 场双周赛  |
 |  1813  |  [句子相似性 III](/solution/1800-1899/1813.Sentence%20Similarity%20III/README.md)  |  `数组`,`双指针`,`字符串`  |  中等  |  第 49 场双周赛  |
+|  1814  |  [统计一个数组中好对子的数目](/solution/1800-1899/1814.Count%20Nice%20Pairs%20in%20an%20Array/README.md)  |  `数组`,`哈希表`,`数学`,`计数`  |  中等  |  第 49 场双周赛  |
 |  1815  |  [得到新鲜甜甜圈的最多组数](/solution/1800-1899/1815.Maximum%20Number%20of%20Groups%20Getting%20Fresh%20Donuts/README.md)  |  `位运算`,`记忆化搜索`,`数组`,`动态规划`,`状态压缩`  |  困难  |  第 49 场双周赛  |
 |  1816  |  [截断句子](/solution/1800-1899/1816.Truncate%20Sentence/README.md)  |  `数组`,`字符串`  |  简单  |  第 235 场周赛  |
 |  1817  |  [查找用户活跃分钟数](/solution/1800-1899/1817.Finding%20the%20Users%20Active%20Minutes/README.md)  |  `数组`,`哈希表`  |  中等  |  第 235 场周赛  |

solution/README_EN.md

@@ -1822,6 +1822,7 @@ Press <kbd>Control</kbd> + <kbd>F</kbd>(or <kbd>Command</kbd> + <kbd>F</kbd> on
 |  1811  |  [Find Interview Candidates](/solution/1800-1899/1811.Find%20Interview%20Candidates/README_EN.md)  |  `Database`  |  Medium  |  🔒  |
 |  1812  |  [Determine Color of a Chessboard Square](/solution/1800-1899/1812.Determine%20Color%20of%20a%20Chessboard%20Square/README_EN.md)  |  `Math`,`String`  |  Easy  |  Biweekly Contest 49  |
 |  1813  |  [Sentence Similarity III](/solution/1800-1899/1813.Sentence%20Similarity%20III/README_EN.md)  |  `Array`,`Two Pointers`,`String`  |  Medium  |  Biweekly Contest 49  |
+|  1814  |  [Count Nice Pairs in an Array](/solution/1800-1899/1814.Count%20Nice%20Pairs%20in%20an%20Array/README_EN.md)  |  `Array`,`Hash Table`,`Math`,`Counting`  |  Medium  |  Biweekly Contest 49  |
 |  1815  |  [Maximum Number of Groups Getting Fresh Donuts](/solution/1800-1899/1815.Maximum%20Number%20of%20Groups%20Getting%20Fresh%20Donuts/README_EN.md)  |  `Bit Manipulation`,`Memoization`,`Array`,`Dynamic Programming`,`Bitmask`  |  Hard  |  Biweekly Contest 49  |
 |  1816  |  [Truncate Sentence](/solution/1800-1899/1816.Truncate%20Sentence/README_EN.md)  |  `Array`,`String`  |  Easy  |  Weekly Contest 235  |
 |  1817  |  [Finding the Users Active Minutes](/solution/1800-1899/1817.Finding%20the%20Users%20Active%20Minutes/README_EN.md)  |  `Array`,`Hash Table`  |  Medium  |  Weekly Contest 235  |