A. Unimodal Array time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Array of integers is unimodal, if: it is strictly increasing in the beginning; after that it is constant; after that it is…

Codeforces Round #258 (Div. 2) Sort the Array B. Sort the Array time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Being a programmer, you like arrays a lot. For your birthday, your friends ha…

Problem G. Grave 题目连接: http://codeforces.com/gym/100531/attachments Description Gerard develops a Halloween computer game. The game is played on a rectangular graveyard with a rectangular chapel in it. During the game, the player places new rectangul…

A. SwapSort time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output In this problem your goal is to sort an array consisting of n integers in at most n swaps. For the given array find the sequence…

Almost Sorted Array Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 262144/262144 K (Java/Others)Total Submission(s): 8541    Accepted Submission(s): 1982 Problem Description We are all familiar with sorting algorithms: quick sort, merge sort…

题目链接: A. Beru-taxi 题意: 问那个taxi到他的时间最短,水题; AC代码: #include <iostream> #include <cstdio> #include <cstring> #include <algorithm> #include <cmath> #include <bits/stdc++.h> #include <stack> #include <map> using n…

题目链接: B. Inventory time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Companies always have a lot of equipment, furniture and other things. All of them should be tracked. To do this, there is…

题目链接: A. Opponents time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Arya has n opponents in the school. Each day he will fight with all opponents who are present this day. His opponents have…

B. Wilbur and Array Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/596/problem/B Description Wilbur the pig is tinkering with arrays again. He has the array a1, a2, ..., an initially consisting of n zeros. At one step, he…

A. Co-prime Array 题目连接: http://www.codeforces.com/contest/660/problem/A Description You are given an array of n elements, you must make it a co-prime array in as few moves as possible. In each move you can insert any positive integral number you want…

题目链接: A. Co-prime Array time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output You are given an array of n elements, you must make it a co-prime array in as few moves as possible. In each move you…

题目链接: B. Amr and The Large Array time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output   Amr has got a large array of size n. Amr doesn't like large arrays so he intends to make it smaller. Amr d…

Problem I. iSharpTime Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://acm.hust.edu.cn/vjudge/contest/view.action?cid=86821#problem/I Description You are developing a new fashionable language that is not quite unlike C, C++, and Java. Since your langua…

题意:给定两个速度,一个一初速度,一个末速度,然后给定 t 秒时间,还每秒速度最多变化多少,让你求最长距离. 析:其实这个题很水的,看一遍就知道怎么做了,很明显就是先从末速度开始算起,然后倒着推. 代码如下: #include <bits/stdc++.h> using namespace std; typedef long long LL; const int maxn = 1e5 + 5; const int INF = 0x3f3f3f3f; vector<int> ans;…

题目链接:http://codeforces.com/problemset/problem/705/A 从第三个输出中可看出规律, I hate that I love that I hate it I hate I love 是来回循环的,不到最后一个每一次循环后面都输出 that,如果到最后则输出 it #include<bits/stdc++.h> using namespace std; int main() { ][]= {"I love ","I ha…

题意:给定 n 个杯子,里面有不同体积的水,然后问你要把所有的杯子的水的体积都一样,至少要倒少多少个杯子. 析:既然最后都一样,那么先求平均数然后再数一下,哪个杯子的开始的体积就大于平均数,这是一定要倒的. 代码如下: #pragma comment(linker, "/STACK:1024000000,1024000000") #include <cstdio> #include <string> #include <cstdlib> #inclu…

*这种题好像不用写题解... 题意: 一个人要改动别人的实验记录,实验记录记录是一个集合 实验记录本身满足:$max(X)-min(X)<=2$ 改动结果要求: 1.新的集合平均值和之前的一样 2.新的集合,$max(Y)<=max(X),min(Y)>=min(X)$ 求新一个和之前相同数值最少的新记录 题解: 首先考虑不同情况, 如果$max-min<=1$ :因为要保证平均值且值域受限制不变,无法改变值(增加一个值之后,要相应的把另外一值减小,而数值只有2/1种,改动没有意义…

题目链接: B. z-sort time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output A student of z-school found a kind of sorting called z-sort. The array a with n elements are z-sorted if two conditions hold:…

对每个storages找一下最短的相邻边 #include <cstdio> #define N 100005 #define inf 0x3f3f3f3f using namespace std; struct edge{ int to,next,w; }e[N<<1]; int head[N],cnt; void add(int u,int v,int w){ e[++cnt]=(edge){v,head[u],w}; head[u]=cnt; } int n,m,k; int…

题目链接: B. Checkpoints 题意: 给了n个点,现在给一个起点,问最少访问n-1个点的最小行走距离是多少; 思路: 分情况讨论就好了; AC代码: #include <iostream> #include <cstdio> #include <cstring> #include <algorithm> #include <cmath> #include <bits/stdc++.h> #include <stack…

题目链接: A. Juicer 题意: 给出n个橘子,汁漫出来了就倒出来,反正就是要求要倒几次; 思路: AC代码: #include <iostream> #include <cstdio> #include <cstring> #include <algorithm> #include <cmath> #include <bits/stdc++.h> #include <stack> #include <map&…

题意: 给你01字符串的长度再给你一个串. 然后你可以在这个串中选择一个起点和一个终点使得这个连续区间内所有的位取反. 求: 经过处理后最多会得到多少次01变换. 例如:0101是4次,0001是2次,000110是3次. 分析: 区间内部的数目是不会发生变化的,因为每一位都是按位取反,相当于都没变,唯一发生变化的是区间边缘,所以考虑到连续的两个或多个1或者0的时候在其中某处设置断点会使得变换次数增加,很容易理解当某处有两个连续点的时候变换次数增加1,因为一个区间只有两个端点所以变换次数最多增加…

题意:给定一个坐标,问你皇后有几个方向可以走. 析:直接格举那八个方向即可. 代码如下: #pragma comment(linker, "/STACK:1024000000,1024000000") #include <cstdio> #include <string> #include <cstdlib> #include <cmath> #include <iostream> #include <cstring&g…

题意:给定 n 个数,表示不同的环,然后把环拆成全是1,每次只能拆成两个,问你有多少次. 析:也不难,反正都要变成1,所以把所有的数都减1,再求和即可. 代码如下: #pragma comment(linker, "/STACK:1024000000,1024000000") #include <cstdio> #include <string> #include <cstdlib> #include <cmath> #include &…

题意:给你若干个数对,给你一个序列,保证数对中的数都在序列中 对于这个序列,询问有多少个区间,不包含这些数对 分析:然后把这些数对转化成区间,然后对于这些区间排序,然后扫一遍,记录最靠右的左端点就好 这是一场cf edu 然后当时做的时候想都没想就树状数组了,SB了,其实不需要 #include<cstdio> #include<cstring> #include<queue> #include<cstdlib> #include<algorithm&…

题意: 一个炉子烤鸡,炉子打开的时候一共$T$分钟可以烤完,关闭的时候一共$2T$分钟可以烤完,炉子每$K$分钟自动关闭,厨师每$D$分钟回来检查,打开炉子 问多长时间烤完.. 题解: 用整数写比较稳妥.. 显然,整个过程是呈周期性的. $K>D , t_r = D*(\left \lfloor\frac{K}{D} \right \rfloor +1)  $ $K<=D,  t_r =D$ 将总时间$T*2$,那每个周期提供的完成度 $C=K+D$ 答案就可以出来了.. 输出的时候除以二 判…

明确一下  一个字符串有x左括号不匹配  和 另一个字符串有x个右括号不匹配  这俩是一定能够匹配的 脑子有点迷 emm... 所以统计就好了  统计x个左括号的有几个,x个右括号的有几个 然后 乘一下 如果一个串 同时存在左右括号都不匹配的情况 则忽略 因为这个串需要另外两个括号去匹配 不要忘了处理左右括号已经匹配的情况 #include <bits/stdc++.h> using namespace std; , INF = 0x7fffffff; typedef long long LL…

题意:给定 n 行数,让你找出连续最多的全是1的个数. 析:好像也没什么可说的,那就判断一下,并不断更新最大值呗. 代码如下: #include <iostream> #include <cmath> #include <cstdlib> #include <set> #include <cstdio> #include <cstring> #include <algorithm> #include <string&…

题意:给定一个串数,表示一种密码锁,再给定一串密码,问你滑动最少的次数,把第一行变成第二行. 析:很简单么,反正只有0-9这个10个数字,那么就是把每一个数从正着滑和倒着滑中找出一个最小的即可,正着滑就是大数减小数,倒着就是小数+10-大数. 代码如下: #include <bits/stdc++.h> using namespace std; typedef long long LL; const int maxn = 1e3 + 5; const int INF = 0x3f3f3f3f;…

题意:给定 n 个数,有正数和-1, -1表示罪犯,正数表示招了几个警察,一个警察只能看一个罪犯,并且要按顺序,问你有多少罪犯逃脱. 析:很简单么,从开始扫到最后,把是正数就加上,是-1判断剩余警察大于0,如果是就让警察数减1,如果不是答案加1. 代码如下: #include <bits/stdc++.h> using namespace std; typedef long long LL; const int maxn = 1e5 + 5; const int INF = 0x3f3f3f3…