time limit per test 2 second memory limit per test 256 megabytes input standard inputoutput standard output You a captain of a ship. Initially you are standing in a point (x1,y1)(x1,y1) (obviously, all positions in the sea can be described by cartesi…
Problem Educational Codeforces Round 60 (Rated for Div. 2) - C. Magic Ship Time Limit: 2000 mSec Problem Description Input Output The only line should contain the minimal number of days required for the ship to reach the point (x2,y2)(x2,y2). If it…
Problem Educational Codeforces Round 60 (Rated for Div. 2) - D. Magic Gems Time Limit: 3000 mSec Problem Description Input The input contains a single line consisting of 2 integers N and M (1≤N≤10^18, 2≤M≤100). Output Print one integer, the total n…
A. Best Subsegment 题意 找 连续区间的平均值 满足最大情况下的最长长度 思路:就是看有几个连续的最大值 #include<bits/stdc++.h> using namespace std; ; int a[maxn]; int main(){ int n; scanf("%d",&n); ; ;i<n;i++)scanf("%d",&a[i]),maxnum=max(maxnum,a[i]); ; ; ;i…
#include <bits/stdc++.h>using namespace std;const long long mod = 1e9+7;unordered_map<long long,long long>mp;long long n,m;long long dp(long long n){ if(n<0) return 0; if(n<m) return 1; if(mp.find(n)!=mp.end())//已经…
题目传送门 题意: 一个魔法水晶可以分裂成m个水晶,求放满n个水晶的方案数(mol1e9+7) 思路: 线性dp,dp[i]=dp[i]+dp[i-m]; 由于n到1e18,所以要用到矩阵快速幂优化 注意初始化 代码: #include<bits/stdc++.h> using namespace std; #define mod 1000000007 typedef long long ll; #define MAX 105 ;//矩阵的大小 int T; ll n,m; ll add(ll…
题意:给你一个长度为\(2*n-1\)的字符串\(s\),让你构造一个长度为\(n\)的字符串,使得构造的字符串中有相同位置的字符等于\(s[1..n],s[2..n+1],...,s[n,2n-1]\)中的位置上的字符. 题解:不难发现,\(s\)中的奇数位字符就是我们要的答案. 代码: int t; int n; char s[N]; int main() { //ios::sync_with_stdio(false);cin.tie(0);cout.tie(0); t=read(); wh…
Codeforces Educational Codeforces Round 44 (Rated for Div. 2) F. Isomorphic Strings 题目连接: http://codeforces.com/contest/985/problem/F Description You are given a string s of length n consisting of lowercase English letters. For two given strings s an…
Codeforces Educational Codeforces Round 44 (Rated for Div. 2) E. Pencils and Boxes 题目连接: http://codeforces.com/contest/985/problem/E Description Mishka received a gift of multicolored pencils for his birthday! Unfortunately he lives in a monochrome w…
Educational Codeforces Round 63 (Rated for Div. 2)题解 题目链接 A. Reverse a Substring 给出一个字符串,现在可以对这个字符串进行一次翻转,问是否存在一种方案,可以使得翻转后字符串的字典序可以变小. 这个很简单,贪心下就行了. 代码如下: Code #include <bits/stdc++.h> using namespace std; typedef long long ll; const int N = 3e5…
Educational Codeforces Round 48 (Rated for Div. 2) C. Vasya And The Mushrooms 题目链接:https://codeforces.com/contest/1016/problem/C 题意: emmm,说不清楚,还是直接看题目吧. 题解: 这个题人行走的方式是有一定的规律的,最后都是直接走到底,然后从另外一行走回来.并且通过画图观察,会发现他走到格子的时间会有一定的规律. 所以就维护几个前缀和就行了,从1到n枚举一下,还要…
Educational Codeforces Round 65 (Rated for Div. 2)题解 题目链接 A. Telephone Number 水题,代码如下: Code #include <bits/stdc++.h> using namespace std; typedef long long ll; const int N = 2e5 + 5; int a[N] ; int n, T; char s[N] ; int main() { cin >> T; whil…
Educational Codeforces Round 64 (Rated for Div. 2)题解 题目链接 A. Inscribed Figures 水题,但是坑了很多人.需要注意以下就是正方形.圆以及三角形的情况,它们在上面的顶点是重合的. 其余的参照样例判断一下就好了了.具体证明我也不会 代码如下: Code #include <bits/stdc++.h> using namespace std; typedef long long ll; const int N = 2e5 +…
Educational Codeforces Round 37 (Rated for Div. 2)C. Swap Adjacent Elements time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output You have an array a consisting of n integers. Each integer from 1…
这场比赛没有打,后来补了一下,第五题数位dp好不容易才搞出来(我太菜啊). 比赛传送门:http://codeforces.com/contest/1073 A. Diverse Substring 题意:给你个字符串,让你找一个子串满足任意一个字符的个数不超过其他字符的总和,输出yes或no表示否存在,如果存在输出任意一个. 这题只要找两个不同的相邻字符,因为两个字符各一个都不超过其他字符的总和,如果字符串只由一个字符组成或长度等于一才会不存在. 代码如下: #include <iostrea…