LeetCode

原题链接： https://leetcode.cn/problems/time-needed-to-buy-tickets/

原题链接： https://leetcode.cn/problems/remove-sub-folders-from-the-filesystem/

原题链接： https://leetcode.cn/problems/word-pattern/description/

原题链接： https://leetcode.cn/problems/check-if-matrix-is-x-matrix/

原题链接： https://leetcode.cn/problems/merge-in-between-linked-lists/

原题链接：https://leetcode-cn.com/problems/unique-paths/

原题链接： https://leetcode.cn/problems/check-if-numbers-are-ascending-in-a-sentence/

原题链接：https://leetcode-cn.com/problems/unique-paths-ii/

原题链接：https://leetcode.cn/problems/calculate-amount-paid-in-taxes/

原题链接：https://leetcode-cn.com/problems/unique-paths-ii/

2180. 统计各位数字之和为偶数的整数个数https://leetcode.cn/problems/count-integers-with-even-digit-sum

1160. 拼写单词 https://leetcode.cn/problems/find-words-that-can-be-formed-by-characters/

原题链接 9. 回文数，https://leetcode.cn/problems/palindrome-number/

原题链接： 112. 路径总和，https://leetcode.cn/problems/path-sum/

原题链接： 112. 路径总和，https://leetcode.cn/problems/path-sum/

19. 删除链表的倒数第 N 个结点 https://leetcode-cn.com/problems/remove-nth-node-from-end-of-list/

原题链接： https://leetcode.cn/problems/add-two-numbers/

原题链接： https://leetcode.cn/problems/excel-sheet-column-number/

原题链接： https://leetcode.cn/problems/cousins-in-binary-tree/

原题链接： https://leetcode.cn/problems/shu-zu-zhong-chu-xian-ci-shu-chao-guo-yi-ban-de-shu-zi-lcof/