fix: 修正readme

Author: zhaoyinglong

README.md

@@ -39,20 +39,20 @@ https://doocs.github.io/leetcode
 
 ### 1. 基础算法
 
--   [在排序数组中查找元素的第一个和最后一个位置](/solution/0000-0099/0034.Find%20First%20and%20Last%20Position%20of%20Element%20in%20Sorted%20Array/README.md) - `二分查找`
--   [准时到达的列车最小时速](/solution/1800-1899/1870.Minimum%20Speed%20to%20Arrive%20on%20Time/README.md) - `二分查找`
--   [可移除字符的最大数目](/solution/1800-1899/1898.Maximum%20Number%20of%20Removable%20Characters/README.md) - `二分查找`
--   [排序数组](/solution/0900-0999/0912.Sort%20an%20Array/README.md) - `快速排序`、`归并排序`
--   [字符串相加](/solution/0400-0499/0415.Add%20Strings/README.md) - `高精度加法`
--   [字符串相乘](/solution/0000-0099/0043.Multiply%20Strings/README.md) - `高精度乘法`
--   [区域和检索 - 数组不可变](/solution/0300-0399/0303.Range%20Sum%20Query%20-%20Immutable/README.md) - `前缀和`
--   [二维区域和检索 - 矩阵不可变](/solution/0300-0399/0304.Range%20Sum%20Query%202D%20-%20Immutable/README.md) - `二维前缀和`
--   [区间加法](/solution/0300-0399/0370.Range%20Addition/README.md) - `前缀和`、`差分`
--   [用邮票贴满网格图](/solution/2100-2199/2132.Stamping%20the%20Grid/README.md) - `二维前缀和`、`二维差分`
--   [无重复字符的最长子串](/solution/0000-0099/0003.Longest%20Substring%20Without%20Repeating%20Characters/README.md) - `双指针`、`哈希表`
--   [乘积小于 K 的子数组](/solution/0700-0799/0713.Subarray%20Product%20Less%20Than%20K/README.md) - `双指针`
--   [位 1 的个数](/solution/0100-0199/0191.Number%20of%201%20Bits/README.md) - `位运算`、`lowbit`
--   [合并区间](/solution/0000-0099/0056.Merge%20Intervals/README.md) - `区间合并`
+-   [在排序数组中查找元素的第一个和最后一个位置](solution/0000-0099/0034.Find%20First%20and%20Last%20Position%20of%20Element%20in%20Sorted%20Array/README.md) - `二分查找`
+-   [准时到达的列车最小时速](solution/1800-1899/1870.Minimum%20Speed%20to%20Arrive%20on%20Time/README.md) - `二分查找`
+-   [可移除字符的最大数目](solution/1800-1899/1898.Maximum%20Number%20of%20Removable%20Characters/README.md) - `二分查找`
+-   [排序数组](solution/0900-0999/0912.Sort%20an%20Array/README.md) - `快速排序`、`归并排序`
+-   [字符串相加](solution/0400-0499/0415.Add%20Strings/README.md) - `高精度加法`
+-   [字符串相乘](solution/0000-0099/0043.Multiply%20Strings/README.md) - `高精度乘法`
+-   [区域和检索 - 数组不可变](solution/0300-0399/0303.Range%20Sum%20Query%20-%20Immutable/README.md) - `前缀和`
+-   [二维区域和检索 - 矩阵不可变](solution/0300-0399/0304.Range%20Sum%20Query%202D%20-%20Immutable/README.md) - `二维前缀和`
+-   [区间加法](solution/0300-0399/0370.Range%20Addition/README.md) - `前缀和`、`差分`
+-   [用邮票贴满网格图](solution/2100-2199/2132.Stamping%20the%20Grid/README.md) - `二维前缀和`、`二维差分`
+-   [无重复字符的最长子串](solution/0000-0099/0003.Longest%20Substring%20Without%20Repeating%20Characters/README.md) - `双指针`、`哈希表`
+-   [乘积小于 K 的子数组](solution/0700-0799/0713.Subarray%20Product%20Less%20Than%20K/README.md) - `双指针`
+-   [位 1 的个数](solution/0100-0199/0191.Number%20of%201%20Bits/README.md) - `位运算`、`lowbit`
+-   [合并区间](solution/0000-0099/0056.Merge%20Intervals/README.md) - `区间合并`
 <!-- 排序算法、待补充 -->
 
 ### 2. 数据结构