题面 传送门 思路 首先,我们观察一下上升数的性质 可以发现,它一定可以表示为最多9个全是1的数字的和 那么我们设$N$可以被表示成$k$个上升数的和,同时我们设$p_i=\underbrace{111\cdots 11}_{i}$ 我们令$a_{i,j}$表示构成$N$的第$I$个上升数的第$j$个全1数的位数 那么可以写出这样的式子 $N=\sum_{i=1}^k\sum_{j=1}^9 p_{a[i][j]}$ 我们发现,$p_{i,j}$这样子摆在这里非常不好操作,那么我们继续观察$p_…

题意: 如果一个十进制非负整数的所有数位从高位到低位是不减的,我们称它为“上升数”,例如1558,11,3,0都是上升数,而10,20170312则不是: 给定整数N,求最小的k使得N能被表示为k个上升数之和. $1\leq N\leq 10^{500000}$ 题解: 一个结论:每个上升数必定能被分解为九个全一数的和: 所谓“全一数”就是指1,1111,11111111这种每一位数都为1的数(包括0),证明显然. 设N可以被分解成K个全一数之和,显然答案$k=\lceil\frac{K}{9}…

题意 给定一个数\(n\),\(n≤10^{500,000}\),问\(n\)最少可以拆分成几个不降数的和.一个不降数是在十进制位下,从高位往低位看,每个数都不会比高位的数更小的数 做法 不降数可以拆成若干个形似\(1111...111\)的数相加 位数为\(l\)的全\(1\)数可以写成\(\dfrac{10^{l+1}-1}{9}\) \(N=\sum\limits_{i=1}^k \dfrac{10^{a_i}-1}{9}\) 通过手玩可以进一步发现充分条件:\(9|k\) 写成\(N+9…

Description 传送门 Solution 依题得所有不下降数(设为a)可以拆为若干个全1数的和(如:1558=1111+111+111+111+111+1+1+1) 并且任意a所能拆出的全一数的个数<=9.则我们设定a拆出9个全1数,其中允许有0的存在.(以下的a[i]可以为所有自然数) (任一全1数可以表示为$\frac{(10^{c}-1)}{9}$) 则$n=\sum _{i=1}^{9k}\frac{(10^{a[i]}-1)}{9}$ $9n=\sum _{i=1}^{9k}(…

题解 题是真的好,我是真的不会做 智商本还是要多开啊QwQ 我们发现一个非下降的数字一定可以用不超过九个1111111111...1111表示 那么我们可以得到这样的一个式子,假如我们用了k个数,那么最多的话可以是这样的 \(N = \sum_{i = 1}^{9k} (10^{r_i} - 1) / 9\) \(9N + 9k = \sum_{i = 1}^{9k} 10^{r_{i}}\) 我们只要每次计算出9N + 9 ,9N + 18...,然后看看十进制下每一位的数字和有没有超过9k,…

传送门 还是猜结论呢 然后我们就想我们可以每次去掉尽量多的位数来保证次数最小,假装这是对的,先写一发,A了 考虑如何去掉尽量多的位数,我们可以找到最大的几位的不下降序列,把最后一个-1,后面全部改成9,这样我们就得到了一个每次去掉数字最前的一个不下降序列,然后将最后一位+1的做法 然后发现有一种情况是不合法的,举个例子:166621 这样我们第一次如果是找不下降序列,就会找到1666,减掉1后就是1665,这就不是不下降了,我们只能取159999,所以对于这种最后一位和倒数第二位是相同的不下降序…

题意: 当一个整数高位数字总不小于低位数字,或者说写成字符串之后单调不下降,称之为上升数.求一个整数最少能表示为多少个上升数的和.(n<=1e500000) 分析: 考虑那些不下降的数字,一定可以写成9个1111...,1111...,11...,0这样的和,每个数可以表示成(10^r-1)/9 我们现在不求最小的k,来改成判定问题,判定n能否写成k个上升数的和 k个上升数对应了9k个(10^ri-1)/9 也就是n=Σ(10^ri-1)/9 (1<=i<=9k) 化简一下就是9n+9k…

今天太晚了...题解到时候补吧(flag立好) 成绩:100+0+0=100 感觉A题本质暴力贪心?C题一道水题我居然没做...亏爆 A:[agc011e]increasing numbers B:[agc008e]next or nextnext(gu) C:[BZOJ1014][JSOI2008]火星人prefix…

题目链接: http://poj.org/problem?id=1239 Increasing Sequences Time Limit: 1000MSMemory Limit: 10000K 问题描述 Given a string of digits, insert commas to create a sequence of strictly increasing numbers so as to minimize the magnitude of the last number. For…

描述 Given a string of digits, insert commas to create a sequence of strictly increasing numbers so as to minimize the magnitude of the last number. For this problem, leading zeros are allowed in front of a number. 输入 Input will consist of multiple tes…

1.作文类型和结构2.作文的四个评分标准3.作文的常用句型4.作文的逻辑观点 大作文分为几类:1.A类(Argument): 这类作文实际上是比较常见的,比如:Caring for children is an important thing of the society. It is suggested that all mothers and fathers should be required to take childcare training courses. Do you agree…

文章来源:http://yannesposito.com/Scratch/en/blog/Learn-Vim-Progressively/   Learn Vim Progressively   TL;DR: You want to teach yourself vim (the best text editor known to human kind) in the fastest way possible. This is my way of doing it. You start by l…

time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output An infinitely long railway has a train consisting of n cars, numbered from 1 to n (the numbers of all the cars are distinct) and positioned…

Sorting Railway Cars time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output An infinitely long railway has a train consisting of n cars, numbered from 1 to n (the numbers of all the cars are dist…

第四部分     推理题 1.世界上每个角落的每个人都有立场,都有背景,都有推理性,能推理出一个人语言的真意,才成就了真正的推理能力: 2.换言之,如果你能通过一个人的说话推理出其身份职业,你的推理能力更上一层楼. 一 . 临门一脚 1. “I believe in human ingenuity – that when we decide on a task to be done, no matter how daunting it may seem at the beginning, we…

http://acm.hust.edu.cn/vjudge/contest/view.action?cid=102419#problem/E Description An infinitely long railway has a train consisting of n cars, numbered from 1 to n (the numbers of all the cars are distinct) and positioned in arbitrary order. David B…

C. Sorting Railway Cars   An infinitely long railway has a train consisting of n cars, numbered from 1 to n (the numbers of all the cars are distinct) and positioned in arbitrary order. David Blaine wants to sort the railway cars in the order of incr…

1. (?:...) 不想保存括号里匹配项时使用 The (?:...) notation should be fairly popular; with it, you can groupparts of a regex, but it does not save them for future retrieval or use. >>> re.findall(r'http://(?:\w+\.)*(\w+\.com)', 'http://google.com http://www.go…

A. Round House time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Vasya lives in a round building, whose entrances are numbered sequentially by integers from 1 to n. Entrance n and entrance 1 …

C. Sorting Railway Cars Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://www.codeforces.com/contest/606/problem/C Description An infinitely long railway has a train consisting of n cars, numbered from 1 to n (the numbers of all the cars are distin…

A. Sorting Railway Cars time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output An infinitely long railway has a train consisting of n cars, numbered from 1 to n (the numbers of all the cars are d…

[原题在此] Let us consider a game on a rectangular board m x 1 consisting of m elementary squares numbered successively from 1 to m. There are n pawns on the board, each on a distinct square. None of them occupies the square with number m. Each single mo…

A. Round House 题目链接http://codeforces.com/contest/659/problem/A Description Vasya lives in a round building, whose entrances are numbered sequentially by integers from 1 to n. Entrance n and entrance 1 are adjacent. Today Vasya got bored and decided t…

A. Round House time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Vasya lives in a round building, whose entrances are numbered sequentially by integers from 1 to n. Entrance n and entrance 1…

自然语言处理,语音处理.文本处理.语音识别(speech recognition),让计算机能够"听懂"人类语音,语音的文字信息"提取". 日本富国生命保险公司花170万美元安装人工智能系统,客户语言转换文本,分析词正面或负面.智能客服是人工能智能公司研究重点.循环神经网络(recurrent neural network,RNN)模型. 模型选择.每一个矩形是一个向量,箭头表示函数.最下面一行输入向量,最上面一行输出向量,中间一行RNN状态.一对一,没用RNN,如…

Description An infinitely long railway has a train consisting of n cars, numbered from 1 to n (the numbers of all the cars are distinct) and positioned in arbitrary order. David Blaine wants to sort the railway cars in the order of increasing numbers…

A题: A题题目链接 题目描写叙述: 位运算 TimeLimit:1000MS  MemoryLimit:65536KB 64-bit integer IO format:%I64d Problem Description 已知一个包括 n 个元素的正整数集合S.设 f(S) 为集合S中全部元素的异或(XOR)的结果. 如:S={1,2,3}, 则 f(S) = 0. 给出集合S,你须要计算 将全部f(s)进行异或后的值, 这里 s⊆S. Input 多组測试数据.第一行包括一个整数T(T≤20…

AtCoder Grand Contest 011 upd:这篇咕了好久,前面几题是三周以前写的... AtCoder Grand Contest 011 A - Airport Bus 翻译 有\(n\)个乘客到达了飞机场,现在他们都要坐车离开机场.第\(i\)个乘客到达的时间是\(T_i\),一个乘客必须在\([T_i,T_i+k]\)时刻做到车,否则他会生气.一辆车最多可以坐\(C\)个人.问最少安排几辆车可以让所有人都不生气. 题解 从前往后贪心即可. #include<iostream…

链接:https://www.nowcoder.com/acm/contest/140/G White Cloud placed n containers in sequence on a axes. The i-th container is located at x[i] and there are a[i] number of products in it. White Rabbit wants to buy some products. The products which are re…

C. Sorting Railway Cars time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output An infinitely long railway has a train consisting of n cars, numbered from 1 to n (the numbers of all the cars are d…