脂环 - 博客园

2020年5月27日

Codeforces Round #645 (Div. 2) C. Celex Update（思维）

摘要： During the quarantine, Sicromoft has more free time to create the new functions in "Celex-2021". The developers made a new function GAZ-GIZ, which inf 阅读全文

posted @ 2020-05-27 11:04 脂环阅读(493) 评论(2) 推荐(1)

Codeforces Round #645 (Div. 2) D. The Best Vacation（二分+前缀和）

摘要： You've been in love with Coronavirus-chan for a long time, but you didn't know where she lived until now. And just now you found out that she lives in 阅读全文

posted @ 2020-05-27 10:40 脂环阅读(433) 评论(0) 推荐(0)

Codeforces Round #645 (Div. 2) B. Maria Breaks the Self-isolation（贪心）

摘要： Maria is the most active old lady in her house. She was tired of sitting at home. She decided to organize a ceremony against the coronavirus. She has 阅读全文

posted @ 2020-05-27 09:47 脂环阅读(348) 评论(0) 推荐(0)

Codeforces Round #645 (Div. 2) A. Park Lighting

摘要： Due to the coronavirus pandemic, city authorities obligated citizens to keep a social distance. The mayor of the city Semyon wants to light up Gluharn 阅读全文

posted @ 2020-05-27 09:36 脂环阅读(479) 评论(0) 推荐(0)

2020年5月18日

Educational Codeforces Round 87 (Rated for Div. 2) E. Graph Coloring （DFS+DP+状态记录+构造）

摘要： You are given an undirected graph without self-loops or multiple edges which consists of nn vertices and mm edges. Also you are given three integers n 阅读全文

posted @ 2020-05-18 23:59 脂环阅读(267) 评论(0) 推荐(0)

2020年5月17日

Educational Codeforces Round 87 (Rated for Div. 2) C2. Not So Simple Polygon Embedding（几何）

摘要： The statement of this problem is the same as the statement of problem C1. The only difference is that, in problem C1, nn is always even, and in C2, nn 阅读全文

posted @ 2020-05-17 20:19 脂环阅读(331) 评论(0) 推荐(1)

Educational Codeforces Round 87 (Rated for Div. 2) C1. Simple Polygon Embedding （几何）

摘要： The statement of this problem is the same as the statement of problem C2. The only difference is that, in problem C1, nn is always even, and in C2, nn 阅读全文

posted @ 2020-05-17 20:13 脂环阅读(337) 评论(0) 推荐(0)

Educational Codeforces Round 87 (Rated for Div. 2) B. Ternary String（贪心？蛮好一题）

摘要： You are given a string ss such that each its character is either 1, 2, or 3. You have to choose the shortest contiguous substring of ss such that it c 阅读全文

posted @ 2020-05-17 19:52 脂环阅读(323) 评论(0) 推荐(1)

Educational Codeforces Round 87 (Rated for Div. 2) A. Alarm Clock（模拟）

摘要： Polycarp has spent the entire day preparing problems for you. Now he has to sleep for at least aa minutes to feel refreshed. Polycarp can only wake up 阅读全文

posted @ 2020-05-17 19:37 脂环阅读(430) 评论(0) 推荐(0)

2020年5月16日

Codeforces Round #643 (Div. 2) D. Game With Array（构造）

摘要： Petya and Vasya are competing with each other in a new interesting game as they always do. At the beginning of the game Petya has to come up with an a 阅读全文

posted @ 2020-05-16 23:22 脂环阅读(328) 评论(0) 推荐(1)

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