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PAT 1010 Radix (25分) radix取值无限制,二分法提高效率
题目 Given a pair of positive integers, for example, 6 and 110, can this equation 6 = 110 be true? The answer is yes, if 6 is a decimal number and 110 i ...
分类:其他好文   时间:2020-05-19 01:04:00    阅读次数:58
Moderna 新型冠状病毒 mRNA 疫苗 mRNA-1273中期试验结果公布
参考: https://investors.modernatx.com/news-releases/news-release-details/moderna-announces-positive-interim-phase-1-data-its-mrna-vaccine May 18, 2020 a ...
分类:其他好文   时间:2020-05-18 22:22:32    阅读次数:361
1100 Mars Numbers (20分)
People on Mars count their numbers with base 13: Zero on Earth is called "tret" on Mars. The numbers 1 to 12 on Earth is called "jan, feb, mar, apr, m ...
分类:其他好文   时间:2020-05-16 15:09:08    阅读次数:63
Xor Sum题解>----(思维+递归)
Xor Sum AtCoder 2272 Time limit : 2sec / Memory limit : 256MB Score : 600 points Problem Statement You are given a positive integer N. Find the number ...
分类:其他好文   时间:2020-05-11 19:09:03    阅读次数:87
找规律
题目 You are given a positive integer N(1≦N≦1e18). Find the number of the pairs of integers u and v(0≦u,v≦N) such that there exist two non-negative inte ...
分类:其他好文   时间:2020-05-11 13:07:17    阅读次数:68
[ARC066B] Xor Sum —— 递归
"Problem Statement" You are given a positive integer $N$. Find the number of the pairs of integers $u$ and $v(0≤u,v≤N)$such that there exist two non n ...
分类:其他好文   时间:2020-05-10 19:32:45    阅读次数:67
计网自顶向下--深入理解传输层
传输层 [TOC] 可靠传输层模型 信赖底层协议,认为底层协议是可靠的,但是实际上底层协议IP层是不可靠协议 在1.0的基础上加上了 ACK :positive acknowledgments NCK :negative acknowledgments ARQ包括: 错误校验( Error dete ...
分类:其他好文   时间:2020-05-09 15:31:14    阅读次数:144
1049 Counting Ones
The task is simple: given any positive integer N, you are supposed to count the total number of 1's in the decimal form of the integers from 1 to N. F ...
分类:其他好文   时间:2020-05-08 22:56:07    阅读次数:76
1127 ZigZagging on a Tree (30分)
Suppose that all the keys in a binary tree are distinct positive integers. A unique binary tree can be determined by a given pair of postorder and ino ...
分类:其他好文   时间:2020-05-06 13:56:18    阅读次数:55
准确率(Accuracy),精确率(Precision),召回率(Recall)和F1-Measure。
机器学习(ML),自然语言处理(NLP),信息检索(IR)等领域,评估(Evaluation)是一个必要的 工作,而其评价指标往往有如下几点:准确率(Accuracy),精确率(Precision),召回率(Recall)和F1-Measure。 TP: Ture Positive 把正的判断为正的 ...
分类:其他好文   时间:2020-05-05 23:09:28    阅读次数:2016
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