原创 Codeforces 845 D. Driving Test （模擬）
Description Polycarp has just attempted to pass the driving test. He ran over the straight road with the signs of
2020-06-24 21:58:35
原创 記筆記本 mac 地址被隔壁 WiFi 拉黑以後
背景 筆者，也就是千千。 千千寒假所居住的地方沒有自己搭建的 WiFi，這讓整天沉迷於網絡的自己怎能忍受，打開 WiFi 列表，大致現在是這個樣子滴。 於是祭出第一道神器 —— WiFi 萬能鑰匙，因爲我想周邊的人一定有很多都使
2020-06-24 21:58:35
9
原创 Codeforces 933 C. A Colourful Prospect （平面圖，歐拉公式）
Description Firecrackers scare Nian the monster, but they’re wayyyyy too noisy! Maybe fireworks make a nice comple
2020-06-24 21:58:35
1
原创 Codeforces 763 A. Timofey and a tree （dfs）
Description Each New Year Timofey and his friends cut down a tree of n vertices and bring it home. After that they
2020-06-24 21:58:35
原创 Codeforces 919 D. Substring （記憶化搜索）
Description You are given a graph with n nodes and m directed edges. One lowercase letter is assigned to each node
2020-06-24 21:58:35
原创 Codeforces 933 B. A Determined Cleanup（數學）
Description In order to put away old things and welcome a fresh new year, a thorough cleaning of the house is a mu
2020-06-24 21:58:22
原创 Codeforces 292 E. Copying Data （線段樹）
Description We often have to copy large volumes of information. Such operation can take up many computer resources
2020-02-21 07:32:09
原创 Codeforces 834 D. The Bakery （線段樹+dp）
Description Some time ago Slastyona the Sweetmaid decided to open her own bakery! She bought required ingredients
2020-02-21 07:32:09
原创 Codeforces 933 A. A Twisty Movement （dp）
Description A dragon symbolizes wisdom, power and wealth. On Lunar New Year’s Day, people model a dragon with bamb
2020-02-21 07:32:09
原创 Codeforces 712 C. Memory and De-Evolution （思維）
Description Memory is now interested in the de-evolution of objects, specifically triangles. He starts with an equ
2020-02-21 07:32:09
原创 Codeforces 844 D. Interactive LowerBound （隨機）
Description This is an interactive problem. You are given a sorted in increasing order singly linked list. You sho
2020-02-21 07:32:09
原创 Codeforces 920 E. Connected Components? （bfs）
Description You are given an undirected graph consisting of n vertices and n(n−1)2−mn(n−1)2−m edges. Instead of g
2020-02-21 07:32:09
原创 Codeforces 714 C. Sonya and Queries （思維）
Description Today Sonya learned about long integers and invited all her friends to share the fun. Sonya has an ini
2020-02-21 07:32:09
原创 Codeforces 844 C. Sorting by Subsequences （循環節）
Description You are given a sequence a1, a2, …, an consisting of different integers. It is required to split this
2020-02-21 07:32:09