【题解】CF 2063F1 Counting Is Not Fun (Easy Version) 考虑初始的答案,显然为卡特兰数H(n)H(n)。 考虑加入一对括号(l,r)(l,r)时对答案的贡献。((l,r)(l,r)表示有一对括号,左括号在ll,右括号在rr。) 我们默认一开始有一对括号(0,n+1)(0,n+1)。当出现一对括号(l,r)(l,r)时,首先要加...
CF F1. Korney Korneevich and XOR (easy version) Codeforces Round #750 (Div. 2) 题意 给定一个长度为n的数组a,要求选择a的一个上升子序列,这个上升子序列所有元素异或值为x,要求求所有的x并从小到大输出,这个子序列可以为空,为空的时候异或值为0. 思路 首先看一下数据范围:n (1≤n≤105).a1,...
代码: cpp #include<bits/stdc++.h>#defineN 200005#definemod 998244353#defineint long longusingnamespacestd;intT;intn;inta[N];intsolve(){if(a[1] >1|| a[n] != n)return0;intans =1;for(inti =1; i <= n; i++) {intp = a[i] - a[i -1];if(p ==0)continue;elseif(p ==...
F1 - Korney Korneevich and XOR (easy version)(暴力+简单DP) 题解:我们发现整个数组中最大值才500,那么异或和得最大值肯定不超过512,所以我们可以暴力枚举异或和的,看当前的异或和值是否存在,记录对应的异或和的值的子序列的最后一个元素并不断更新,这样我们就可以做DP了。 具体见代码。 AC代码: #include...
F1. Microtransactions (easy version) time limit per test2 seconds memory limit per test256 megabytes The only difference between easy and hard versions is constraints. Ivan plays a computer game that contains some microtransactions to make characters look cooler. Since Ivan wants his character to ...
CF1203F1 Complete the Projects (easy version) 题解 贪心,题目链接:https://www.luogu.com.cn/problem/CF1203F1题目大意:有$n$个任务,初始有$r$点体力。完成第$i$个任务前至少需要$a_i$
Microtransactions (easy version) 题目来源: F1:https://codeforces.com/contest/1165/problem/F1 F2:https://codeforces.com/contest/1165/problem/F2 题意:AA现在有n种装备要买,每个装备要买ki个,每一天的早上AA会赚到1元钱,每个装备的价钱都是2元,但是现在有m个特价活动(d1,ti)意思是在di天的时候第ti...
KM:Yeah, I agree with most of what's been said. I mean, it's more exciting. There's more stuff happening. Not that a normal weekend is boring in any way but there's a lot of running that doesn't count for anything. And having most of the sessions in the weekend counting for so...
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AF version 1.98.52Detected PKEY:9001B2F1Card life counter:61.74%P-key nokia moduleversion 01.02DetectedJAF INTERFACEversion:01.B0,Driver version:40000,Library version:30107JAF DCT4/BB5 LOADERS DIR: d:VAF\Flash\JAF DCT4/BB5 PRODUCT DIR: D: Nokia\products\JAFUSB LOADERS DIR: d:VAF\FlashUSB\JAF...