feat: 91

Author: lucifer

README.md

@@ -107,10 +107,10 @@ leetcode 题解，记录自己的 leetcode 解题之路。
 
 > 这里仅列举具有**代表性题目**，并不是全部题目
 
-目前更新了 212 道题解，加上专题涉及的题目，差不多有 **300 道**。
+目前更新了 200 多道题解，加上专题涉及的题目，差不多有 **300 道**。
 
-- [高频考题（简单 70 题）](./collections/easy.md)
-- [高频考题（中等 112 题）](./collections/medium.md)
+- [高频考题（简单 72 题）](./collections/easy.md)
+- [高频考题（中等 114 题）](./collections/medium.md)
 - [高频考题（困难 30 题）](./collections/hard.md)
 
 ### 数据结构与算法的总结(23 篇)

SUMMARY.md

@@ -50,6 +50,7 @@
     * [0021. 合并两个有序链表](problems/21.merge-two-sorted-lists.md)
     * [0026. 删除排序数组中的重复项](problems/26.remove-duplicates-from-sorted-array.md)
     * [0053. 最大子序和](problems/53.maximum-sum-subarray-cn.md)
+    * [0066. 加一](problems/66.plus-one.md) 91
     * [0088. 合并两个有序数组](problems/88.merge-sorted-array.md)
     * [0101. 对称二叉树](problems/101.symmetric-tree.md)
     * [0104. 二叉树的最大深度](problems/104.maximum-depth-of-binary-tree.md)
@@ -69,7 +70,7 @@
     * [0206. 反转链表](problems/206.reverse-linked-list.md)
     * [0219. 存在重复元素 II](problems/219.contains-duplicate-ii.md)
     * [0226. 翻转二叉树](problems/226.invert-binary-tree.md)
-    * [0232. 用栈实现队列](problems/232.implement-queue-using-stacks.md)
+    * [0232. 用栈实现队列](problems/232.implement-queue-using-stacks.md) 91
     * [0263. 丑数](problems/263.ugly-number.md)
     * [0283. 移动零](problems/283.move-zeroes.md)
     * [0342. 4的幂](problems/342.power-of-four.md)
@@ -78,6 +79,7 @@
     * [0437. 路径总和 III](problems/437.path-sum-iii.md)
     * [0455. 分发饼干](problems/455.AssignCookies.md)
     * [0575. 分糖果](problems/575.distribute-candies.md)
+    * [821. 字符的最短距离](problems/821.shortest-distance-to-a-character.md) 91
     * [0874. 模拟行走机器人](problems/874.walking-robot-simulation.md)
     * [1260. 二维网格迁移](problems/1260.shift-2d-grid.md)
     * [1332. 删除回文子序列](problems/1332.remove-palindromic-subsequences.md)
@@ -153,6 +155,7 @@
     * [0365. 水壶问题](problems/365.water-and-jug-problem.md)
     * [0378. 有序矩阵中第K小的元素](problems/378.kth-smallest-element-in-a-sorted-matrix.md)
     * [0380. 常数时间插入、删除和获取随机元素](problems/380.insert-delete-getrandom-o1.md)
+    * [0394. 字符串解码](problems/394.decode-string.md) 91
     * [0416. 分割等和子集](problems/416.partition-equal-subset-sum.md)
     * [0445. 两数相加 II](problems/445.add-two-numbers-ii.md)
     * [0454. 四数相加 II](problems/454.4-sum-ii.md)
@@ -194,6 +197,7 @@
     * [1310. 子数组异或查询](problems/1310.xor-queries-of-a-subarray.md)
     * [1334. 阈值距离内邻居最少的城市](problems/1334.find-the-city-with-the-smallest-number-of-neighbors-at-a-threshold-distance.md)
     * [1371.每个元音包含偶数次的最长子字符串](problems/1371.find-the-longest-substring-containing-vowels-in-even-counts.md)
+    * [1381. 设计一个支持增量操作的栈](../problems/1381.design-a-stack-with-increment-operation.md) 91
     * [1558. 得到目标数组的最少函数调用次数](../problems/1558.minimum-numbers-of-function-calls-to-make-target-array.md)
     * [1631. 最小体力消耗路径](problems/1631.path-with-minimum-effort.md)
 

collections/easy.md

@@ -4,14 +4,15 @@
 
 当然也不排除很多 hard 题目也可以暴力模拟，大家平时多注意数据范围即可。
 
-以下是我列举的经典题目：
+以下是我列举的经典题目（带 91 字样的表示出自 **91 天学算法**活动）：
 
 - [面试题 17.12. BiNode](../problems/binode-lcci.md)
 - [0001. 两数之和](../problems/1.two-sum.md)
 - [0020. 有效的括号](../problems/20.valid-parentheses.md)
 - [0021. 合并两个有序链表](../problems/21.merge-two-sorted-lists.md)
 - [0026. 删除排序数组中的重复项](../problems/26.remove-duplicates-from-sorted-array.md)
 - [0053. 最大子序和](../problems/53.maximum-sum-subarray-cn.md)
+- [0066. 加一](../problems/66.plus-one.md) 91
 - [0088. 合并两个有序数组](../problems/88.merge-sorted-array.md)
 - [0101. 对称二叉树](../problems/101.symmetric-tree.md)
 - [0104. 二叉树的最大深度](../problems/104.maximum-depth-of-binary-tree.md)
@@ -25,21 +26,22 @@
 - [0169. 多数元素](../problems/169.majority-element.md)
 - [0172. 阶乘后的零](../problems/172.factorial-trailing-zeroes.md)
 - [0190. 颠倒二进制位](../problems/190.reverse-bits.md)
-- [0191. 位1的个数](../problems/191.number-of-1-bits.md)
+- [0191. 位 1 的个数](../problems/191.number-of-1-bits.md)
 - [0198. 打家劫舍](../problems/198.house-robber.md)
 - [0203. 移除链表元素](../problems/203.remove-linked-list-elements.md)
 - [0206. 反转链表](../problems/206.reverse-linked-list.md)
 - [0219. 存在重复元素 II](../problems/219.contains-duplicate-ii.md)
 - [0226. 翻转二叉树](../problems/226.invert-binary-tree.md)
-- [0232. 用栈实现队列](../problems/232.implement-queue-using-stacks.md)
+- [0232. 用栈实现队列](../problems/232.implement-queue-using-stacks.md) 91
 - [0263. 丑数](../problems/263.ugly-number.md)
 - [0283. 移动零](../problems/283.move-zeroes.md)
-- [0342. 4的幂](../problems/342.power-of-four.md)
+- [0342. 4 的幂](../problems/342.power-of-four.md)
 - [0349. 两个数组的交集](../problems/349.intersection-of-two-arrays.md)
 - [0371. 两整数之和](../problems/371.sum-of-two-integers.md)
 - [0437. 路径总和 III](../problems/437.path-sum-iii.md)
 - [0455. 分发饼干](../problems/455.AssignCookies.md)
 - [0575. 分糖果](../problems/575.distribute-candies.md)
+- [821. 字符的最短距离](../problems/821.shortest-distance-to-a-character.md) 91
 - [0874. 模拟行走机器人](../problems/874.walking-robot-simulation.md)
 - [1260. 二维网格迁移](../problems/1260.shift-2d-grid.md)
-- [1332. 删除回文子序列](../problems/1332.remove-palindromic-subsequences.md)
+- [1332. 删除回文子序列](../problems/1332.remove-palindromic-subsequences.md)

collections/hard.md

@@ -22,7 +22,7 @@
 2. 暴力枚举所有可能的算法往上套，比如图的题目。
 3. 总结和记忆解题模板，减少解题压力
 
-以下是我列举的经典题目：
+以下是我列举的经典题目（带 91 字样的表示出自 **91 天学算法**活动）：
 
 - [0004. 寻找两个正序数组的中位数](../problems/4.median-of-two-sorted-arrays.md)
 - [0023. 合并 K 个升序链表](../problems/23.merge-k-sorted-lists.md)

collections/medium.md

@@ -4,7 +4,7 @@
 
 这部分的题目要不需要我们挖掘题目的内含信息， 将其抽象成简单题目。 要么是一些写起来比较麻烦的题目， 一些人编码能力不行就挂了。因此大家一定要自己做， 即使看了题解”会了“，也要自己码一遍。自己不亲自写一遍，里面的细节永远不知道。
 
-以下是我列举的经典题目：
+以下是我列举的经典题目（带 91 字样的表示出自 **91 天学算法**活动）：
 
 - [面试题 17.09. 第 k 个数](../../problems/get-kth-magic-number-lcci.md)
 
@@ -77,6 +77,7 @@
 - [0365. 水壶问题](../problems/365.water-and-jug-problem.md)
 - [0378. 有序矩阵中第 K 小的元素](../problems/378.kth-smallest-element-in-a-sorted-matrix.md)
 - [0380. 常数时间插入、删除和获取随机元素](../problems/380.insert-delete-getrandom-o1.md)
+- [0394. 字符串解码](../problems/394.decode-string.md) 91
 - [0416. 分割等和子集](../problems/416.partition-equal-subset-sum.md)
 - [0445. 两数相加 II](../problems/445.add-two-numbers-ii.md)
 - [0454. 四数相加 II](../problems/454.4-sum-ii.md)
@@ -118,5 +119,6 @@
 - [1310. 子数组异或查询](../problems/1310.xor-queries-of-a-subarray.md)
 - [1334. 阈值距离内邻居最少的城市](../problems/1334.find-the-city-with-the-smallest-number-of-neighbors-at-a-threshold-distance.md)
 - [1371.每个元音包含偶数次的最长子字符串](../problems/1371.find-the-longest-substring-containing-vowels-in-even-counts.md)
+- [1381. 设计一个支持增量操作的栈](../problems/1381.design-a-stack-with-increment-operation.md) 91
 - [1558. 得到目标数组的最少函数调用次数](../problems/1558.minimum-numbers-of-function-calls-to-make-target-array.md) 🆕
 - [1631.path-with-minimum-effort](../problems/1631.path-with-minimum-effort.md) 🆕