这时我们将相同的 3 压缩成一个,并记录重复次数 cnt=3 。此时要进行转移,前面 \{1,2\} 这一部分依然可以参照之前已经求出来的 dp 数组,而后面的部分是类似 3*dp_{i,0}+3*dp_{i-1,1}+3*dp_{i-2,0} 的,也就是刚刚读入的数乘上一个交错dp前缀和,我们可以用pre数组维护交替dp前缀和。 时间复杂...
cadec.notion.site/Codeforces-Round-759-Div-2-based-on-Technocup-2022-Elimination-Round-3-d630c5c75bf6480cb9a110291d1e5780 概要: A. Life of a Flower 略 B.Array Eversion 给定一个长度为n的数组a,x每次操作,会将a分为两个数组,其中一个是小于等于a[n]的,另一个是大于a[n]的,顺序和原...
比赛链接:Codeforces Round #759 (Div. 2, based on Technocup 2022 Elimination Round 3)A题 Life of a Flower题目大意:给出一颗植物和一个长度为 nn 的0101 串, 00 表示当天不浇水, 11 表示当天浇水,并且满足连续浇水 +5+5 ,单次浇水 +1+1 ,两天不交直接死亡...
Technocup 2020 — Elimination Round 3 + Codeforces Round 602: Editorial By nocriz, 5 years ago, 1262A - Math Problem Writer: RDDCCD Tutorial 1262B - Box Writer: RDDCCD Tutorial 1261A - Messy Writer: RDDCCD Tutorial 1261B1 - Optimal Subsequences (Easy Version) Writer: MikeMirzayanov Tuto...
This weekend, at Oct/17/2021 14:05 (Moscow time) we will hold Codeforces Round 749 (Div. 1 + Div. 2, based on Technocup 2022 Elimination Round 1). It is based on the problems of Technocup 2022 Elimination Round 1 that will be held at the same time. Note the unusual start time ...
我要达成最外层有三个,那直接把前面四个字符更改成了()() 然后再加上后面一个这个(…),不就可以了吗?(这也就是本题贪心思路所在) (2)注意题目输出中的这么一句话, In the first line print integer m (0≤m≤n) — the number of operations. You do not need to minimize m, any value is suita...
Codeforces Round #692 (Div. 1, based on Technocup 2021 Elimination Round 3) 题解&总结 A~F,目前人生中最惨的一次CF……被B卡住了,过了之后几乎没什么时间搞后面的题了。最后B还FST了。rating暴跌。改题的时候发现A~E都水爆了。%%%gmh77重新拿回红名体验卡。A答案上限
Technocup 2017 - Elimination Round 1 (Unofficially Open for Everyone, Rated for Div. 2) A Vasily has a numbera, which he wants to turn into a numberb. For this purpose, he can do two types of operations: multiply the current number by2 (that is, replace the numberxby2·x);...
Codeforces Technocup 2017 - Elimination Round 1 题解 只看楼主 收藏 回复quailty 算法狂人 11 RT quailty 算法狂人 11 A. 倒着做,可以发现如果b是偶数只能进行操作1,否则只能进行操作2B. 抠出所有数字直接加起来C. 询问a[1]+a[2]、a[2]+a[3]和a[3]+a[1]的值之后可以解出a[1]、a[2]...
codeforces Technocup 2017 - Elimination Round 2/Codeforces Round #380 (Div. 2, Rated, Based on Technocup 2017 - Elimination Round 2) 题解 久违的下午场,打了一场状态不错一下rank12涨了207~~~ A. Interview with Oleg 题意: 给你一个长度不...