D. Two Strings Swaps time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output You are given two strings aa and bb consisting of lowercase English letters, both of length nn. The characters of both…

[链接] 我是链接,点我呀:) [题意] 题意 [题解] 注意只能改变a不能改变b 然后只要让a[i],b[i],a[n-i-1],b[n-i-1]这4个字符能凑成两对.全都一样就可以了 分类讨论下就好 [代码] #include <bits/stdc++.h> #define ll long long using namespace std; const int N = 300; int n; string s1,s2; map<char,int> dic,dic1; int m…

题目 题意是给了两个字符串a和b,然后可以对这两个字符串有三种操作来使这两个字符串相等,一是交换a[i]和b[i],二是交换a[i]和a[n-i+1],三是交换b[i]和b[n-i+1],这三个操作都是不计步数的,然后问最少还需要多少步可以让a串等于b串. 分析:我们可以想到我们只要关心a[i],a[n-i+1],b[i],b[n-i+1],这四个数即可,只要他们是构成两队相等的对字符,我们就可以通过交换变成是相等的字符串,所以我们遍历一遍 分类讨论: 一组字符中存在两对相等字符的情况则不需要替…

题意:给你两个长度相同的字符串\(a\)和\(b\),你可以将相同位置上的\(a\)和\(b\)的字符交换,也可以将\(a\)或\(b\)中某个位置和对应的回文位置上的字符交换,这些操作是不统计的,你可以将\(a\)的某个字符替换,操作数+1,然后可以执行上文的操作,问最少操作多少次,使得\(a\)和\(b\)相等. 题解:我们只对\(a_{i},a_{n-i+1},b_{i},b_{n-i-1}\)进行判断,如果这\(4\)个数各不相同,那么就需要修改2个\(a\),如果有\(3\)个不相同,…

                                                                           . A. Adjacent Replacements 执行1e9次命令,输出的最后数组的样子 一个奇数执行两次命令 会变回原来的数字 一个偶数只会执行一次命令 变成比自身小1的数 #include<bits/stdc++.h> #define int long long #define MAX(a,b,c) max(a,max(b,c)) #de…

[比赛链接] https://codeforces.com/contest/1006 [题解] Problem A. Adjacent Replacements        [算法] 将序列中的所有偶数替换为奇数即可 时间复杂度 : O(N) [代码] #include<bits/stdc++.h> using namespace std; template <typename T> inline void chkmax(T &x,T y) { x = max(x,y);…

题目如下: You are given two strings s1 and s2 of equal length consisting of letters "x" and "y" only. Your task is to make these two strings equal to each other. You can swap any two characters that belong to different strings, which means…

You are given three strings aa , bb and cc of the same length nn . The strings consist of lowercase English letters only. The ii -th letter of aa is aiai , the ii -th letter of bb is bibi , the ii -th letter of cc is cici . For every ii (1≤i≤n1≤i≤n )…

March 18, 2016 Problem statement: https://www.hackerrank.com/challenges/two-strings/submissions/code/18506948 Julia likes to try a new way to train herself to expand C#/ C++ / Java / JavaScript languages, by reading the solutions, followed up with so…

StackOverFlow排错翻译 - Python字符串替换: How do I replace everything between two strings without replacing the strings? 原创连接: Python字符串替换 问题: Python:如何将两字符串之间的内容替换掉? I have this string(问题源码): str = ''' // DO NOT REPLACE ME // Anything might be here. Numbers…