做题记录 - 随笔分类(第17页) - zltzlt

AtCoder Beginner Contest 149 F Surrounded Nodes

摘要：[洛谷传送门](https://www.luogu.com.cn/problem/AT_abc149_f "洛谷传送门") [AtCoder 传送门](https://atcoder.jp/contests/abc149/tasks/abc149_f "AtCoder 传送门") 不错的题。考虑题阅读全文

posted @ 2023-06-06 20:26 zltzlt 阅读(70) 评论(0) 推荐(0)

CodeForces 1838E Count Supersequences

摘要：[洛谷传送门](https://www.luogu.com.cn/problem/CF1838E "洛谷传送门") [CF 传送门](https://codeforces.com/problemset/problem/1838/E "CF 传送门") **结论：$a_i$ 对答案没有影响。** 考虑阅读全文

posted @ 2023-06-06 17:32 zltzlt 阅读(35) 评论(0) 推荐(0)

AtCoder Beginner Contest 225 F String Cards

摘要：[洛谷传送门](https://www.luogu.com.cn/problem/AT_abc225_f "洛谷传送门") [AtCoder 传送门](https://atcoder.jp/contests/abc225/tasks/abc225_f "AtCoder 传送门") 这题是真的强。。阅读全文

posted @ 2023-06-06 07:06 zltzlt 阅读(36) 评论(0) 推荐(0)

AtCoder Beginner Contest 225 G X

摘要：[洛谷传送门](https://www.luogu.com.cn/problem/AT_abc225_g "洛谷传送门") [AtCoder 传送门](https://atcoder.jp/contests/abc225/tasks/abc225_g "AtCoder 传送门") 感觉是一种很新的建阅读全文

posted @ 2023-06-05 22:15 zltzlt 阅读(26) 评论(0) 推荐(0)

AtCoder Beginner Contest 281 Ex Alchemy

摘要：[洛谷传送门](https://www.luogu.com.cn/problem/AT_abc281_h "洛谷传送门") [AtCoder 传送门](https://atcoder.jp/contests/abc281/tasks/abc281_h "AtCoder 传送门") 考虑设 $f_i$ 阅读全文

posted @ 2023-06-05 20:22 zltzlt 阅读(40) 评论(0) 推荐(0)

AtCoder Beginner Contest 287 G Balance Update Query

摘要：[洛谷传送门](https://www.luogu.com.cn/problem/AT_abc287_g "洛谷传送门") [AtCoder 传送门](https://atcoder.jp/contests/abc287/tasks/abc287_g "AtCoder 传送门") 线段树上二分入门题阅读全文

posted @ 2023-06-04 22:10 zltzlt 阅读(39) 评论(0) 推荐(0)

AtCoder Beginner Contest 259 G Grid Card Game

摘要：[洛谷传送门](https://www.luogu.com.cn/problem/AT_abc259_g "洛谷传送门") [AtCoder 传送门](https://atcoder.jp/contests/abc259/tasks/abc259_g "AtCoder 传送门") 记 $b_i = 阅读全文

posted @ 2023-06-04 22:03 zltzlt 阅读(22) 评论(0) 推荐(0)

AtCoder Beginner Contest 214 H Collecting

摘要：[洛谷传送门](https://www.luogu.com.cn/problem/AT_abc214_h "洛谷传送门") [AtCoder 传送门](https://atcoder.jp/contests/abc214/tasks/abc214_h "AtCoder 传送门") 好毒瘤啊…… 首先阅读全文

posted @ 2023-06-03 08:31 zltzlt 阅读(47) 评论(0) 推荐(0)

AtCoder Beginner Contest 214 G Three Permutations

摘要：[洛谷传送门](https://www.luogu.com.cn/problem/AT_abc214_g "洛谷传送门") [AtCoder 传送门](https://atcoder.jp/contests/abc214/tasks/abc214_g "AtCoder 传送门") 比较平凡的一个容斥阅读全文

posted @ 2023-06-01 18:45 zltzlt 阅读(59) 评论(0) 推荐(0)

AtCoder Beginner Contest 247 Ex Rearranging Problem

摘要：[洛谷传送门](https://www.luogu.com.cn/problem/AT_abc247_h "洛谷传送门") [AtCoder 传送门](https://atcoder.jp/contests/abc247/tasks/abc247_h "AtCoder 传送门") 考虑我们如何判定一阅读全文

posted @ 2023-06-01 13:15 zltzlt 阅读(47) 评论(0) 推荐(0)

AtCoder Beginner Contest 213 H Stroll

摘要：[洛谷传送门](https://www.luogu.com.cn/problem/AT_abc213_h "洛谷传送门") [AtCoder 传送门](https://atcoder.jp/contests/abc213/tasks/abc213_h "AtCoder 传送门") 考虑一个朴素 dp 阅读全文

posted @ 2023-06-01 10:42 zltzlt 阅读(31) 评论(0) 推荐(0)

AtCoder Beginner Contest 258 Ex Odd Steps

摘要：[洛谷传送门](https://www.luogu.com.cn/problem/AT_abc258_h "洛谷传送门") [AtCoder 传送门](https://atcoder.jp/contests/abc258/tasks/abc258_h "AtCoder 传送门") 不错的矩阵快速幂优阅读全文

posted @ 2023-05-30 22:10 zltzlt 阅读(30) 评论(0) 推荐(0)

AtCoder Regular Contest 153 D Sum of Sum of Digits

摘要：[洛谷传送门](https://www.luogu.com.cn/problem/AT_arc153_d "洛谷传送门") [AtCoder 传送门](https://atcoder.jp/contests/arc153/tasks/arc153_d "AtCoder 传送门") 又浪费一道好题![ 阅读全文

posted @ 2023-05-30 20:28 zltzlt 阅读(32) 评论(0) 推荐(0)

AtCoder Regular Contest 148 E ≥ K

摘要：[洛谷传送门](https://www.luogu.com.cn/problem/AT_arc148_e "洛谷传送门") [AtCoder 传送门](https://atcoder.jp/contests/arc148/tasks/arc148_e "AtCoder 传送门") 是一道不错的计数。阅读全文

posted @ 2023-05-29 22:44 zltzlt 阅读(37) 评论(0) 推荐(0)

CodeForces 1830D Mex Tree

摘要：[洛谷传送门](https://www.luogu.com.cn/problem/CF1830D "洛谷传送门") [CF 传送门](https://codeforces.com/contest/1830/problem/D "CF 传送门") 考虑答案的下界。对整棵树进行二分图染色，我们得到答案阅读全文

posted @ 2023-05-29 13:56 zltzlt 阅读(92) 评论(0) 推荐(1)

CodeForces 1830C Hyperregular Bracket Strings

摘要：[洛谷传送门](https://www.luogu.com.cn/problem/CF1830C "洛谷传送门") [CF 传送门](https://codeforces.com/contest/1830/problem/C "CF 传送门") 每一步思路都非常自然的题。考虑先从一些简单的 cas 阅读全文

posted @ 2023-05-29 13:48 zltzlt 阅读(163) 评论(0) 推荐(0)

AtCoder Regular Contest 161 E Not Dyed by Majority (Cubic Graph)

摘要：[洛谷传送门](https://www.luogu.com.cn/problem/AT_arc161_e "洛谷传送门") [AtCoder 传送门](https://atcoder.jp/contests/arc161/tasks/arc161_e "AtCoder 传送门") 给构造题提供了一种阅读全文

posted @ 2023-05-29 08:49 zltzlt 阅读(89) 评论(0) 推荐(0)

AtCoder Beginner Contest 303 G Bags Game

摘要：[洛谷传送门](https://www.luogu.com.cn/problem/AT_abc303_g "洛谷传送门") [AtCoder 传送门](https://atcoder.jp/contests/abc303/tasks/abc303_g "AtCoder 传送门") 经典题，考虑区间阅读全文

posted @ 2023-05-28 19:19 zltzlt 阅读(134) 评论(0) 推荐(0)

AtCoder Regular Contest 139 E Wazir

摘要：洛谷传送门 AtCoder 传送门好题。这种题一般可以考虑，观察最优解的性质，对于性质计数。发现如果 $n,m$ 均为偶数，可以放满。就是类似这样： #.#.#. .#.#.# #.#.#. .#.#.# 因此答案就是 $2$。如果 $n,m$ 有一个为偶数，不妨假设 $n$ 阅读全文

posted @ 2023-05-26 15:56 zltzlt 阅读(19) 评论(0) 推荐(0)

CodeForces 1837F Editorial for Two

摘要：[洛谷传送门](https://www.luogu.com.cn/problem/CF1837F "洛谷传送门") [CF 传送门](https://codeforces.com/problemset/problem/1837/F "CF 传送门") 这是一个常规 $\log^2$ 做法。最大值最阅读全文

posted @ 2023-05-26 15:30 zltzlt 阅读(68) 评论(0) 推荐(0)

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随笔分类 - 做题记录

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