B. National Project 题意:总长度为n的公路进行维修,天气是有规律性的,连续g天的好天气,连续b天的坏天气,必须在好天气进行维护,问至少维护n的一半,那么至少需要多少天 思路:必须是g的整数倍和b的整数倍构成的天数,通过相除,假设g+b是一组,最后尾巴那算作单算 想法:1)这个数必须是g的整数倍和b的整数倍构成的,或者是直接输出n,这个限制条件是题目中没有提到,但是你必须写的 代码: 1 #include<iostream> 2 #include<algorithm&g…

B - B CodeForces - 994B 题内容: Unlike Knights of a Round Table, Knights of a Polygonal Table deprived of nobility and happy to kill each other. But each knight has some power and a knight can kill another knight if and only if his power is greater than…

B - Saving the City cf--1443B Bertown is a city with nn buildings in a straight line. The city's security service discovered that some buildings were mined. A map was compiled, which is a string of length nn, where the ii-th character is "1" if…

题目 C - C CodeForces - 1166C The legend of the foundation of Vectorland talks of two integers xx and yy. Centuries ago, the array king placed two markers at points |x| and |y|on the number line and conquered all the land in between (including the endp…

B - B CodeForces - 699B 题目: You are given a description of a depot. It is a rectangular checkered field of n × m size. Each cell in a field can be empty (".") or it can be occupied by a wall ("*"). You have one bomb. If you lay the bom…

B - B CodeForces - 879B n people are standing in a line to play table tennis. At first, the first two players in the line play a game. Then the loser goes to the end of the line, and the winner plays with the next person from the line, and so on. The…

补题系列之西安网络赛1011 题目大意:给定一个椭球: 求它到原点的最短距离. 思路: 对于一个椭球的标准方程 x^2/a^2 + y^2/b^2 +z^2/c^2=1 来说,它到原点的最短距离即为min(a,b,c) 所以我们需要把原方程化为标准型. 这时候线代就排上用场了,注意到原方程是一个二次型. 化为标准型 1/(k1)*x^2+1/(k2)*y^2+1/(k3)*z^2=1 后  min(k1,k2,k3)即为答案 而这里的1/k1,1/k2,1/k3 就是二次型矩阵的特征值 如何求特…

网页设计课上实在无聊,便开始补题,发现比赛时候僵着的东西突然相通了不少 首先,"追妹"这题,两个队友讨论半天,分好多种情况最后放弃(可是我连题目都没看啊),今天看了之后试试是不是直接判断情况就可以,于是出现 #include<stdio.h> int main() { int T,n,m,a,b,u,v,i,flag; scanf("%d",&T); while(T--) { flag=; scanf("%d%d%d%d",&…

2018 HDU多校第四场赛后补题 自己学校出的毒瘤场..吃枣药丸 hdu中的题号是6332 - 6343. K. Expression in Memories 题意: 判断一个简化版的算术表达式是否合法. 题解: 注意细节即可. 代码: #include <bits/stdc++.h> using namespace std; int n; char s[505]; int main () { int T; cin>>T; for ( ; T; --T) { scanf(&quo…

2018 HDU多校第三场赛后补题 从易到难来写吧,其中题意有些直接摘了Claris的,数据范围是就不标了. 如果需要可以去hdu题库里找.题号是6319 - 6331. L. Visual Cube 题意: 在画布上画一个三维立方体. 题解: 模拟即可. 代码: #include <bits/stdc++.h> using namespace std; int a, b, c, R, C; char g[505][505]; int main () { int T; cin >>…