Content 有一个名叫 Lucky chances 的游戏,游戏一开始给出一个 \(r\times c\) 的矩阵,你可以选定矩阵中任意一个元素以及上.下.左.右四个方向中的任意一个方向进行游戏.如果这个方向上的任意一个元素都严格小于所选的元素,那么你就赢了. 试求出所有元素的能够使得你赢得游戏的方向的总和. 数据范围:\(1\leqslant r,c\leqslant 100\),矩阵内的每个元素不超过 \(1000\). Solution 我们直接每个方向直接模拟,看能否赢得游戏,能的话…

Content 年份中有不超过 \(1\) 个非 \(0\) 数字的年份是幸运年份.现给出当前年份 \(n\),求到下一个幸运年份还要等多久. 数据范围:\(1\leqslant n\leqslant 10^9\). Solution 分类讨论,只需要 \(\texttt{if}\) 即可: \(1\leqslant n\leqslant 9\),此时只需要再等一年. \(10\leqslant n\leqslant 99\),那我们就肯定只有 \(n\equiv 0\pmod {10}\) 的…

Lucky 2048 uses a normal distribution to create "lucky" start. Generally speaking, it provides lucky chances "most likely to be medium result, and very small probability to get very good results". Toll edition: μ = 7.0, σ = 1.0, probab…

2015浙江财经大学ACM有奖周赛(一) 题解报告 命题:丽丽&&黑鸡 这是命题者原话. 题目涉及的知识面比较广泛,有深度优先搜索.广度优先搜索.数学题.几何题.贪心算法.枚举.二进制等等... 有些题目还需要大家对程序的效率做出优化..大一的小宝宝可能有一些吃不消..当成是一种体验就好了. 题解目录: ZUFE OJ 2307: 最长连续不下降子串 ZUFE OJ 2308: Lucky Number ZUFE OJ 2309: 小明爱吃面 ZUFE OJ 2310: 小明爱消除 ZUF…

2015-2016 ACM-ICPC, NEERC, Northern Subregional Contest 2019年10月11日 15:35-20:35(Solved 8,Penalty 675) 这两天好像回寝室太早了,导致早早地就躺在床上吸引蚊子.到睡觉的点的时候,蚊子们就已经嗷嗷待哺地聚集到了我的床边.凌晨2:00~4:00的时候被烦得,只能下床喷个六神+开个空调QwQ.早上起不来导致很多东西都咕咕咕了(比如今日中午的市中心觅食计划). 以后不出意外的话,我们队应该每周三&周六的这个…

之所以在codeforces上找这100道水题的原因是为了巩固我对最近学的编程语言的掌握程度. 找的方式在codeforces上的PROBLEMSET中过的题最多的那些题里面出现的最前面的10个题型,它们是: math(数学) brute force(暴力) strings(字符串) implementation(模拟) greedy(贪心) sortings(排序) number theory(数论) constructive algorithm dp(动态规划) shortest path(…

$$2015-2016\ ACM-ICPC,\ NEERC,\ Northern\ Subregional\ Contest$$ \(A.Alex\ Origami\ Squares\) 签到 //#pragma comment(linker, "/STACK:1024000000,1024000000") #include<bits/stdc++.h> using namespace std; int main(){ int a,b; freopen("alex…

更好的阅读体验 Portal Portal1: Codeforces Portal2: Luogu Description Petya loves lucky numbers. Everybody knows that lucky numbers are positive integers whose decimal representation contains only the lucky digits \(4\) and \(7\). For example, numbers \(47\)…

这题没有压行就成 \(\texttt{Hard Version}\) 最短代码解了( 要知道这题那么 \(sb\) 就不啃 \(D\) 和 \(E\) 了. \(\texttt{Solution}\) 首先有一个非常简单但是错误的多重背包的想法: 让分拆出来的 \(k\) 个数中,每一个数在十进制下每一位都是 \(0, 3, 6\) 或 \(9\),于是对于第 \(x\) 位把 \(3k\) 个大小为 \(3 \times 10^x\), 价值为 \(F_x\) 的物品丢进多重背包里面,然后输出…

ZOJ3944 People Counting ZOJ3939 The Lucky Week 1.PeopleConting 题意:照片上有很多个人,用矩阵里的字符表示.一个人如下: .O. /|\ (.) 占3*3格子,句号“.”为背景.没有两个人完全重合.有的人被挡住了一部分.问照片上有几个人. 题解: 先弄个常量把3*3人形存起来,然后6个部位依次找,比如现在找头,找到一个头,就把这个人删掉(找这个人的各个部位,如果在该部位位置的不是这个人的身体,就不删),删成句号,疯狂找就行了. 代码:…

Lucky Problem Description WLD is always very lucky.His secret is a lucky number K.k is a fixed odd number. Now he meets a stranger with N numbers:a1,a2,...,aN.The stranger asks him M questions.Each question is like this:Given two ranges [Li,Ri] and […

F. The Pool for Lucky Ones Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/gym/100637/problem/F Description A new swimming pool has been built in Kazan for the forthcoming Water Sports World Championship. The pool has N lanes. Some…

Lucky 题目链接: http://acm.hust.edu.cn/vjudge/contest/123316#problem/G Description Chaos August likes to study the lucky numbers. For a set of numbers S,we set the minimum non-negative integer,which can't be gotten by adding the number in S,as the lucky…

ztr loves lucky numbers 题目链接: http://acm.hust.edu.cn/vjudge/contest/121332#problem/I Description ztr loves lucky numbers. Everybody knows that positive integers are lucky if their decimal representation doesn't contain digits other than 4 and 7. For…

C. Lucky Numbers time limit per test 0.5 seconds memory limit per test 64 megabytes input standard input output standard output The numbers of all offices in the new building of the Tax Office of IT City will have lucky numbers. Lucky number is a num…

F. The Pool for Lucky Ones Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/gym/100637/problem/F Description A new swimming pool has been built in Kazan for the forthcoming Water Sports World Championship. The pool has N lanes. Some…

Lucky ticketsTime Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://acm.hust.edu.cn/vjudge/contest/view.action?cid=86686#problem/J Description Everyone knows that in less than a month the Ice Hockey World Championship will start in Minsk. But few of the…

题意: 一个数只含有4,7就是lucky数...现在有一串长度为n的数...问这列数有多少个长度为k子串..这些子串不含两个相同的lucky数... 子串的定义..是从这列数中选出的数..只要序号不同..就不不同的串..如 1 1 的长度为1的子串有两个 题解: 解题前可以先求一下1000000000内有多少个数是lucky的...可以递推的求..也可以暴力求~~可以看出最多1022个lucky数..很少... 现将这堆数的所有lucky数找出来...把相同的放在一个lucky数里计数... d…

Description Lucky Sum time limit per test: 2 seconds memory limit per test: 256 megabytes input: standard input output: standard output Petya loves lucky numbers. Everybody knows that lucky numbers are positive integers whose decimal representation c…

2016 ACM/ICPC Asia Regional Qingdao Online(部分题解) 5878---I Count Two Three http://acm.hdu.edu.cn/showproblem.php?pid=5878 Time Limit: 3000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 1287    Accepted Submissi…

A. On The Way to Lucky Plaza time limit per test 1.0 s memory limit per test 256 MB input standard input output standard output Alaa is on her last day in Singapore, she wants to buy some presents to her family and friends. Alaa knows that the best p…

题意:给你N种硬币,每种硬币有Si个,有Pi 概率朝上,每次抛所有硬币抛起,所有反面的拿掉,问每种硬币成为最后的lucky硬币的概率. 题解:都知道是概率dp,但是模拟赛时思路非常模糊,很纠结,dp[10][1e6]这个状态让我觉得丝毫没有用,当时一直以为每种硬币是互相独立的.然后中间吃了个饭,回来又想了很久很久,就是不想看题解,然后发现,这个dp和极限有关,同时状态跟走了几步有极大的关系.否则你初始值根本没法赋,那么显然我猜既然保留6位,肯定当数字小到一定程度时是可以忽略的,也就是进行的次数多…

Lucky Coins 题目连接: http://acm.hdu.edu.cn/showproblem.php?pid=5985 Description Bob has collected a lot of coins in different kinds. He wants to know which kind of coins is lucky. He finds out a lucky kind of coins by the following way. He tosses all th…

 2017 JUST Programming Contest 2.0 题目链接:http://codeforces.com/gym/101343/problem/A A. On The Way to Lucky Plaza time limit per test:1.0 s memory limit per test:256 MB input:standard input output:standard output Alaa is on her last day in Singapore, s…

题目链接:https://www.nowcoder.com/acm/contest/207/D 题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=5985 时间限制:C/C++ 1秒,其他语言2秒空间限制:C/C++ 262144K,其他语言524288K64bit IO Format: %lld题目描述 Bob has collected a lot of coins in different kinds. He wants to know which…

[题目链接] A. ZOJ 4004 - Easy Number Game 首先肯定是选择值最小的 $2*m$ 进行操作,这些数在操作的时候每次取一个最大的和最小的相乘是最优的. #include <bits/stdc++.h> using namespace std; const int maxn = 100010; int T, n, m; long long a[maxn]; int main() { scanf("%d", &T); while(T--) {…

题目描述 Petya loves lucky numbers very much. Everybody knows that lucky numbers are positive integers whose decimal record contains only the lucky digits 4 and 7. For example, numbers 47, 744, 4 are lucky and 5, 17, 467 are not. Petya has sequence aa co…

Petya loves lucky numbers. Everybody knows that lucky numbers are positive integers whose decimal representation contains only the lucky digits 4 and 7. For example, numbers 47, 744, 4 are lucky and 5, 17, 467 are not. Petya has an array consisting o…

Karp-de-Chant Number(BZOJ-4922) - 竞赛题解 进行了一次DP的练习,选几道题写一下博客~ 标签:BZOJ / 01背包 / 贪心 『题目』 >> There! 给出 \(n\) 个括号字符串(只包含'(',')'),你需要从中选出一些字符串并对它们排序,使得它们连成一个字符串后构成一个匹配的字符串.求构成的字符串的最大长度~ 『题解』 假如我们不考虑顺序,只考虑选择哪些字符串,我们很容易想到 dp[i][j] 表示在前 \(i\) 个字符串中选出一些字符串使得…

Broken Tree(CF-758E) - 竞赛题解 贪心复习~(好像暴露了什么算法--) 标签:贪心 / DFS / Codeforces 『题意』 给出一棵以1为根的树,每条边有两个值:p-强度.w-重量. 对于给出的树,我们可以对每条边进行操作--将它的p.w同时减去相同的值,但是要求 \(p\ge0,w>0\) .(注意只能减,不能加) 进行操作后,需要使原树满足:如果 u 是 v 的父亲,那么 u 到 v 的边的 p 不能小于 以 v 为根节点的子树中所有边的 w 之和. 求出一种方…