17.1 swap a number in place.(without temporary variables) a = a ^ b; b = a ^ b; a = a ^ b; 17.3 Write a function which computes the number of trailing zeros in n factorial. To count the number of zeros, we only need to count the pairs of multiples of…

递归题目,注意结合了memo的方法和trie的应用 package Moderate; import java.util.Hashtable; import CtCILibrary.AssortedMethods; import CtCILibrary.Trie; /** * Oh, no! You have just completed a lengthy document when you have an unfortu- nate Find/Replace mishap. You have…

npm 安装包之后,如果出现类似下面的信息 found 12 vulnerabilities (7 moderate, 5 high) run `npm audit fix` to fix them, or `npm audit` for details 如果 npm audit fix,之后还是有问题,可能是不能自动 fix,尽量不要 --force 强制 fix. 可以先 npm update,然后 npm audit 查看详情,再手动安装相关库.…

题面 B - Moderate Differences Time limit : 2sec / Memory limit : 256MB Score : 400 points Problem Statement There are N squares in a row. The leftmost square contains the integer A, and the rightmost contains the integer B. The other squares are empty.…

http://agc017.contest.atcoder.jp/tasks/agc017_b B - Moderate Differences Time limit : 2sec / Memory limit : 256MB Score : 400 points Problem Statement There are N squares in a row. The leftmost square contains the integer A, and the rightmost contain…

19 1  Write a function to swap a number in place without temporary variables void swap(int &a, int &b) { b = a - b; // 4 = 9 - 5 a = a - b; // 5 = 9 - 4 b = a + b; // 9 = 4 + 5 } void swap(int & a, int &b) { a = a^b; b = a^b; a = a^b; } 19…

这章学了基本光照模型,物体的显示受到以下效果影响:全局环境光,点光源(环境光漫反射分量,点光源漫反射分量,点光源镜面反射分量),材质系数(漫反射系数,镜面反射系数),自身发光,雾气效果等.其中点光源有辐射衰减(距离)和角衰减,根据距离或角度影响光的强度(即颜色).                  透明度计算公式: 雾气计算公式:   下例画出的是浅灰色雾气的环境下,有浅黄色背景光,偏红色的漫反射光和偏灰白的镜面反射光照在茶壶上的效果: #include <GLUT/GLUT.h> GLsiz…

又是一道思路特别清奇的题qwq...(瞪了一上午才发现O(1)的结论...差点还想用O(n)解决) 问题可以转化为是否能够由\(f_{1}=a\)通过\(\pm x \in[c,d]\)得到\(f_{n}=b\),于是考虑用数学方法解决 证明比较简单...就是...能想到这一点就很毒瘤了qwq...让我来随手拿一个样例举例qwq 输入样例2:4 7 6 4 5 输出样例2:NO 丝毫不想画图...太乱惹qwq 为了能看的更明白我还是画吧qwq(感谢GeoGebra) 注:横坐标表示框内数值,纵坐…

LINK 题意:给出最左和最右两个数,要求往中间填n-2个数,使得相邻数间差的绝对值$∈[L,R]$ 思路:其实也是个水题,比赛中大脑宕机似的居然想要模拟构造一个数列,其实我们只要考虑作为结果的数,其结果必定是进行n-1次了+L -L +R -R 的其中一项,其最小值为$x*L-(n-1-x)*R$ 最大值则是$x*R-(n-1-x)*L$ 那么我们枚举x 其中只要有一种情况使b在区间中满足条件就行了 /** @Date : 2017-07-09 20:31:43 * @FileName: B.…

Introduction Log files are files that contain messages about the system, including the kernel, services, and applications running on it. There are different log files for different information. For example, there is a default system log file, a log f…