随笔分类 -  思维题

求字符串有多少个回文子串
摘要：1 class Solution { 2 public: 3 int countSubstrings(string s) { 4 int n = s.size(), sum = 0; 5 for(int i = 0; i < n*2-1; i++) 6 { 7 int l = i / 2, r = 阅读全文
posted @ 2020-08-19 00:43 TTTCoder 阅读(525) 评论(0) 推荐(0)
位运算交换两个变量的值
摘要：a^a = 0 一个数异或任何一个数偶数次值不变 阅读全文
posted @ 2019-10-29 20:40 TTTCoder 阅读(1167) 评论(0) 推荐(1)
二叉树两个节点的最大路径
摘要：参考博客：传送门 问题：如何求二叉树两个节点的最大路径 阅读全文
posted @ 2019-09-02 21:34 TTTCoder 阅读(996) 评论(0) 推荐(0)
codeforce897c Nephren gives a riddle
摘要：原题链接http://codeforces.com/contest/897/problem/C What are you doing at the end of the world? Are you busy? Will you save us? 原题链接http://codeforces.com/ 阅读全文
posted @ 2017-12-06 21:00 TTTCoder 阅读(307) 评论(0) 推荐(0)
codeforce895B
摘要：While Vasya finished eating his piece of pizza, the lesson has already started. For being late for the lesson, the teacher suggested Vasya to solve on 阅读全文
posted @ 2017-11-29 20:47 TTTCoder 阅读(319) 评论(0) 推荐(0)
code force 893D Credit Card
摘要：Recenlty Luba got a credit card and started to use it. Let's consider n consecutive days Luba uses the card. She starts with 0 money on her account. I 阅读全文
posted @ 2017-11-25 15:26 TTTCoder 阅读(461) 评论(0) 推荐(0)
hdu5954 Do not pour out
摘要：You have got a cylindrical cup. Its bottom diameter is 2 units and its height is 2 units as well. The height of liquid level in the cup is d (0 ≤ d ≤ 阅读全文
posted @ 2017-10-02 17:57 TTTCoder 阅读(450) 评论(0) 推荐(0)
约瑟夫环lightoj1179
摘要：Josephus Problem The historian Flavius Josephus relates how, in the Romano-Jewish conflict of 67 A.D., the Romans took the town of Jotapata which he w 阅读全文
posted @ 2017-08-18 17:14 TTTCoder 阅读(335) 评论(0) 推荐(0)
hdu2115
摘要：I Love This Game Time Limit: 3000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 7987 Accepted Submission(s): 273 阅读全文
posted @ 2017-06-15 12:36 TTTCoder 阅读(304) 评论(0) 推荐(0)
hdu2114
摘要：Calculate S(n) Problem Description Calculate S(n).S(n)=13+23 +33 +......+n3 . Input Each line will contain one integer N(1 < n < 1000000000). Process 阅读全文
posted @ 2017-06-13 22:04 TTTCoder 阅读(308) 评论(0) 推荐(0)
那么大奶牛之神
摘要：题目描述 那么大奶牛之神把一个神秘数字通过信使传递给了奶牛们，但由于信件上出现了偏差，一个数字变成了两个数字,现在你需要通过这两个数字还原出大么大奶牛之神给的神秘数字。需要用第二个数字通过加(+)，减(-)，乘(*)，除(/)，次幂(^)，阶乘(!)，开平方(√)这几个符号凑出第一个数字。使用第二个 阅读全文
posted @ 2017-06-11 22:29 TTTCoder 阅读(340) 评论(0) 推荐(0)
第四届图灵赛A题谷神的赌博游戏
摘要：题目描述 NEUQ的谷神要和我赌一个游戏：谷神要求我随机在纸上写出整数集合{1,2,3，...,3n+1}（n是整数）的一个排列（即不重复的随机写出从1到3n+1的所有整数）。并且要求在我写的过程中，从我写的第一个数开始一直加到我正在写的数的总和不被3整除。如果我能写出来符合要求的一个排列，那么我就 阅读全文
posted @ 2017-06-11 22:23 TTTCoder 阅读(317) 评论(0) 推荐(0)
hdu1005
摘要：Number Sequence Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 171693 Accepted Submission(s): 42 阅读全文
posted @ 2017-05-17 22:42 TTTCoder 阅读(267) 评论(0) 推荐(0)
hdu1003最大连续子序列
摘要：Problem Description Given a sequence a[1],a[2],a[3]......a[n], your job is to calculate the max sum of a sub-sequence. For example, given (6,-1,5,4,-7 阅读全文
posted @ 2017-05-16 23:31 TTTCoder 阅读(252) 评论(0) 推荐(0)
HDU5980
摘要：As is known to all,the ASCII of character 'a' is 97. Now,find out how many character 'a' in a group of given numbers. Please note that the numbers her 阅读全文
posted @ 2017-05-13 21:44 TTTCoder 阅读(253) 评论(0) 推荐(0)
CF754A
摘要：One spring day on his way to university Lesha found an array A. Lesha likes to split arrays into several parts. This time Lesha decided to split the a 阅读全文
posted @ 2017-05-11 21:41 TTTCoder 阅读(505) 评论(1) 推荐(0)