目录 ICPC North Central NA Contest 2018 1. 题目分析 2. 题解 A.Pokegene B.Maximum Subarrays C.Rational Ratio D.Travel the Skies E. Euler's Number F. Lipschitz Constant G. Tima goes to Xentopia H. New Salaries I. Other Side J.Kaleidoscopic Palindromes ICPC Nor…

题目描述 Peter returned from the recently held ACM ICPC World finals only to find that his return flight was overbooked and he was bumped from the flight! Well, at least he wasn’t beat up by the airline and he’s received a voucher for one free flight bet…

目录 2018-2019 ICPC, NEERC, Southern Subregional Contest (Codeforces 1070) A.Find a Number(BFS) C.Cloud Computing(线段树) D.Garbage Disposal(模拟) E.Getting Deals Done(二分) F.Debate(贪心) H.BerOS File Suggestion(后缀自动机) I.Privatization of Roads in Berland(网络流)…

2018-2019 ICPC, NEERC, Southern Subregional Contest 闲谈: 被操哥和男神带飞的一场ACM,第一把做了这么多题,荣幸成为7题队,虽然比赛的时候频频出锅,差点被鸽,但还算打完了5h 总的来说这场还是不算难的,7题还是少了点 A 题目: 给出a,b,求出一个数满足是a的倍数,且数字和为b 题解: 男神懒得写博客就甩锅了 直接宽搜,宽搜时队列中的状态保存为x,y,x表示当前的数%a==x,y表示数字和 然后记录状态和方案就行了 参考代码: #inclu…

2019-2020 ICPC, Asia Jakarta Regional Contest (Online Mirror, ICPC Rules, Teams Preferred) easy: ACEGHK medium-easy: BJL medium: D ?????: I A. B. C. 对 \(R[],C[]\) 分别按奇偶性分段. 网! D. 考虑 check 一个串,枚举右走对应的前缀 pre,下走对应的后缀 suf. 把每行反串拼接中间连特殊字符,建 SA,能 match 上 p…

题目链接: 2018 ICPC Pacific Northwest Regional Contest - I-Inversions 题意 给出一个长度为\(n\)的序列,其中的数字介于0-k之间,为0表示这个位置是空的.现在可以在这些空的位置上任意填入1-k之间的数字(可以重复).问最多可以总共有多少对逆序对.(如果\(i<j,p_i>p_j\),则称\((i,j)\)是一对逆序对) \(1\leq n\leq 2*10^5,\ 1\leq k\leq 100\) 思路 第一步,先证明最优的填…

NAIPC 2017 Yin and Yang Stones 75.39% 1000ms 262144K   A mysterious circular arrangement of black stones and white stones has appeared. Ming has been tasked with balancing the stones so that only one black and one white stone remain. Ming has two ope…

A.Babs' Box Boutique 给定n个盒子,每个盒子都有长宽高(任意两个盒子长宽高不完全相同),现在选盒子的任意两面,要求x1 <= x2 && y1 <= y2,问最多能选多少盒子满足这需求. 直接dfs暴搞................ #include <cstdio> #include <cstring> #include <string> #include <iostream> #include <c…

A.Babs' Box Boutique 一道简单的dfs搜索题,需要两两比较,然后搜到底,得到最大值就行了.比赛时队友写的,我只负责debug..赛后自己写的.. #include<iostream> #include<cstdio> #include<algorithm> #include<cstring> #include<string> #include<cmath> #include<set> #include&…

A .Abstract Art 题意:求多个多边形的面积并. 思路:模板题. #include<bits/stdc++.h> using namespace std; typedef long long ll; const double inf=1e200; ; *atan(1.0); :(x<?-:);} struct point{ double x,y; point(,):x(a),y(b){} }; point operator +(point A,point B) { retur…