医生工程师 - 博客园

【LeetCode】171. Excel Sheet Column Number 解题小结

摘要：题目： Related to question Excel Sheet Column Title Given a column title as appear in an Excel sheet, return its corresponding column number. For example 阅读全文

posted @ 2016-09-11 08:51 医生工程师阅读(191) 评论(0) 推荐(0) 编辑

【LeetCode】258. Add Digits 解题小结

摘要：题目： Given a non-negative integer num, repeatedly add all its digits until the result has only one digit. For example: Given num = 38, the process is l 阅读全文

posted @ 2016-09-11 08:18 医生工程师阅读(83) 评论(0) 推荐(0) 编辑

【LeetCode】263. Ugly Number

摘要：题目： Write a program to check whether a given number is an ugly number. Ugly numbers are positive numbers whose prime factors only include 2, 3, 5. For 阅读全文

posted @ 2016-09-10 15:30 医生工程师阅读(82) 评论(0) 推荐(0) 编辑

【LeetCode】9. Palindrome Number

摘要：题目： Determine whether an integer is a palindrome. Do this without extra space. 简单题。看到两个比较好的解法，一个是把数字转化为字符串，然后首尾对比，往中间靠。另一种是数字分别从两头求和（保留位数：*10 + 余数），如果阅读全文

posted @ 2016-09-10 10:43 医生工程师阅读(87) 评论(0) 推荐(0) 编辑

【LeetCode】8. String to Integer (atoi)

摘要：题目： Implement atoi to convert a string to an integer. Hint: Carefully consider all possible input cases. If you want a challenge, please do not see be 阅读全文

posted @ 2016-09-10 10:21 医生工程师阅读(116) 评论(0) 推荐(0) 编辑

【LeetCode】7. Reverse Integer

摘要：题目 Reverse digits of an integer. Example1: x = 123, return 321Example2: x = -123, return -321 简单题，需要考虑两个问题，1）如果输入的末尾是0怎么办？2）如果倒过来的数字溢出了怎么办？阅读全文

posted @ 2016-09-10 08:47 医生工程师阅读(77) 评论(0) 推荐(0) 编辑

【LeetCode】231. Power of Two

摘要：题目： Given an integer, write a function to determine if it is a power of two. 非常简单的一道题目阅读全文

posted @ 2016-09-10 08:14 医生工程师阅读(101) 评论(0) 推荐(0) 编辑

【LeetCode】 19. Remove Nth Node From End of List 解题小结

摘要：题目： Given a linked list, remove the nth node from the end of list and return its head. For example, 首先容易想到的是先遍历一次链表，计算链表长度L，然后再次遍历到L-n的位置删除结点。更好的办法是应用阅读全文

posted @ 2016-09-07 12:16 医生工程师阅读(165) 评论(0) 推荐(0) 编辑

【LeetCode】21. Merge Two Sorted Lists 解题小结

摘要：题目：Merge two sorted linked lists and return it as a new list. The new list should be made by splicing together the nodes of the first two lis 相对还是简单的，阅读全文

posted @ 2016-09-07 11:04 医生工程师阅读(91) 评论(0) 推荐(0) 编辑

［LeetCode］ 237. Delete Node in a Linked Lis解题小结

摘要：题目： Write a function to delete a node (except the tail) in a singly linked list, given only access to that node. Supposed the linked list is 1 -> 2 -> 阅读全文

posted @ 2016-09-05 23:36 医生工程师阅读(123) 评论(0) 推荐(0) 编辑