[题目] C. Smallest Word [描述] IA有一个由若干个'a'和'b'组成的字符串,IA可以翻转该字符串的任意长的前缀,IA想通过这样的操作得到一个字典序最小的字符串,求一种可能的翻转方案.输出是否翻转长度为k的前缀,k=1,2,...,n,n为该字符串长度. 数据范围:1<=字符串长度<=1000 [思路] 为了把第m+1个字符挪到第1个位置并保持其他字符不动,可以翻转m长的和m+1长的前缀(先后顺序不影响结果).于是,我们可以通过这样的操作把每一个'a'挪到最前面,最后就得…

链接 [http://codeforces.com/contest/1043/problem/C] 题意 给你一个只包含a,b的字符串,有一种操作把第1个字符到第i个字符的子串进行反转,问要使最后字符串字典序最小那些位置需要反转, 分析 代码 #include<bits/stdc++.h> using namespace std; #define ll long long int main(){ ios::sync_with_stdio(false); cin.tie(0); cout.tie…

题意 题目链接 Sol 这题打cf的时候真的是脑残,自己造了个abcdad的数据开心的玩了半天一脸懵逼...最后还好ycr大佬给了个思路不然就凉透了... 首先不难看出我们最后一定可以把字符串弄成\(aaaabbb\)的形式,若当前位和下一位不一样就直接转就行了 注意特判一下最后一个位置 /* */ #include<iostream> #include<cstdio> #include<cstring> #include<algorithm> #inclu…

题意:给定一个由a和b构成的字符串,可以选择翻转或不翻转他的每个前缀,翻转记为1不翻转记为0,求能将字符串排序的字典序最小的操作序列 n<=1e3 思路:考虑极长的一段a [t,w] 翻转t-1与w就能把这段a移到最前面 #include<cstdio> #include<cstring> #include<string> #include<cmath> #include<iostream> #include<algorithm>…

[链接] 我是链接,点我呀:) [题意] [题解] 模拟了一两下.. 然后发现. 对于每一个前缀. 组成的新的最小字典序的字符串 要么是s[i]+reverse(前i-1个字符经过操作形成的最大字典序的字符串);或者是 (前i-1个字符经过操作形成的最小字典序的字符串)+s[i] 因为最大字典序,翻转一下,然后把s[i]放前面..显然更可能得到较小字典序的字符串. 这个最大字典序的字符串类似处理一下就Ok. [代码] #include <bits/stdc++.h> #define rep1(…

题目链接  Dhinwaji is an acclaimed poet and likes to play with words and letters. He has bought some stickers where each sticker has a lower case english letter (a-z). The letters are indexed from 1 - 26 i.e. a has index 1, b has index 2 and so on. He ha…

链接:http://codeforces.com/contest/1043 A - Elections - [水水水水题] 题意: 我和另一个人竞争选举,共有 $n$ 个人投票,每个人手上有 $k$ 票,必须投给我或者另一个人. 现在已知每个人给另一个人投 $a_i$ 票,也就是说会给我投 $k-a_i$ 票.求最小的整数 $k$,使得我的票数严格大于另一个人. 题解: 暴力枚举 $k$. AC代码: #include<bits/stdc++.h> using namespace std; ;…

Codeforces Round #519 by Botan Investments #include<bits/stdc++.h> #include<iostream> #include<cstdio> #include<cstdlib> #include<cstring> #include<cmath> #include<algorithm> #include<queue> #include<vect…

题目链接:传送门   A. Elections (思维+暴力) 思路: 从最小的k开始枚举就好了- -. #include <bits/stdc++.h> using namespace std; + ; int a[MAX_N]; int main() { int N; cin >> N; , sum = ; ; i <= N; i++) { scanf("%d", a+i); m = max(m, a[i]); sum += a[i]; } int a…

A. Elections 题意概述 给出 \(a_1, \ldots, a_n\),求最小的 \(k (k \ge \max a_i)\), 使得 \(\sum_{i=1}^n a_i < \sum_{i=1}^n (k-a_i)\) 原题链接 解题思路 数据范围小,直接枚举就好了 代码 #include <bits/stdc++.h> using namespace std; int main() { ios::sync_with_stdio(false); int n; cin &g…

题目: Lexicographical order is often known as alphabetical order when dealing with strings. A string is greater than another string if it comes later in a lexicographically sorted list.Given a word, create a new word by swapping some or all of its char…

开个新号打打codeforces(以前那号玩废了),结果就遇到了这么难一套.touristD题用了map,被卡掉了(其实是对cf的评测机过分自信),G题没过, 700多行代码,码力惊人.关键是这次tourist掉到第二了,掉了200多分,为神节哀. 做了4道,要不是第4题一直炸第5题也能做出来.本来想着上蓝名的.然后我第二题挂了,判断循环节写错了.绝望啊---- 比赛传送门:http://codeforces.com/contest/1043 A. Elections 这题很简单,就是说有n个人…

A string such as "word" contains the following abbreviations: ["word", "1ord", "w1rd", "wo1d", "wor1", "2rd", "w2d", "wo2", "1o1d", "1or1", "…

A string such as "word" contains the following abbreviations: ["word", "1ord", "w1rd", "wo1d", "wor1", "2rd", "w2d", "wo2", "1o1d", "1or1", "…

trie -- suffix tree -- suffix automa 有这么几个情况: 用户输入即时响应AJAX搜索框, 显示候选名单. 搜索引擎keyword统计数量. 后缀树(Suffix Tree): 从根到叶子表示一个后缀. 只从这一个简单的描写叙述,我们能够概念上解决以下的几个问题: P:查找字符串o是否在字符串S中 A:若o在S中,则o必定是S的某个后缀的前缀. 用S构造后缀树.按在trie中搜索字串的方法搜索o就可以. P: 指定字符串T在字符串S中的反复次数. A: 假设T在…

Find the minimum length word from a given dictionary words, which has all the letters from the string licensePlate. Such a word is said to complete the given string licensePlate Here, for letters we ignore case. For example, "P" on the licensePl…

Given a list of strings words representing an English Dictionary, find the longest word in words that can be built one character at a time by other words in words. If there is more than one possible answer, return the longest word with the smallest l…

Given a string and a string dictionary, find the longest string in the dictionary that can be formed by deleting some characters of the given string. If there are more than one possible results, return the longest word with the smallest lexicographic…

Given two words (beginWord and endWord), and a dictionary's word list, find the length of shortest transformation sequence from beginWord to endWord, such that: Only one letter can be changed at a time. Each transformed word must exist in the word li…

Given a string and a string dictionary, find the longest string in the dictionary that can be formed by deleting some characters of the given string. If there are more than one possible results, return the longest word with the smallest lexicographic…

Given a list of strings words representing an English Dictionary, find the longest word in words that can be built one character at a time by other words in words. If there is more than one possible answer, return the longest word with the smallest l…

Find the minimum length word from a given dictionary words, which has all the letters from the string licensePlate. Such a word is said to complete the given string licensePlate Here, for letters we ignore case. For example, "P" on the licensePl…

https://leetcode.com/problems/longest-word-in-dictionary-through-deleting/ Given a string and a string dictionary, find the longest string in the dictionary that can be formed by deleting some characters of the given string. If there are more than on…

Given a list of strings words representing an English Dictionary, find the longest word in words that can be built one character at a time by other words in words. If there is more than one possible answer, return the longest word with the smallest l…

We define the smallest positive real number as the number which is explicitly greater than zero and yet less than all other positive real numbers except itself. The smallest positive real number, if exists, implies the existence of the second greater…

Find the minimum length word from a given dictionary words, which has all the letters from the string licensePlate. Such a word is said to completethe given string licensePlate Here, for letters we ignore case. For example, "P" on the licensePla…

Given a list of strings words representing an English Dictionary, find the longest word in words that can be built one character at a time by other words in words. If there is more than one possible answer, return the longest word with the smallest l…

1. Question Given a string and a string dictionary, find the longest string in the dictionary that can be formed by deleting some characters of the given string. If there are more than one possible results, return the longest word with the smallest l…

Given a list of strings words representing an English Dictionary, find the longest word in words that can be built one character at a time by other words in words. If there is more than one possible answer, return the longest word with the smallest l…

Given a string and a string dictionary, find the longest string in the dictionary that can be formed by deleting some characters of the given string. If there are more than one possible results, return the longest word with the smallest lexicographic…