dma competition 2017

The 2017 electronic design competition has been in the past nearly a year, and I finally have the time to match the specific details of the game out to provide you with a detailed reference to facilitate the subsequent rapid, meticulous learning. I was one of the quickest people to make a sample question before the 17 game. The cricket system, which used acrylic, 3D printing and laser cutting, achieved the

Question link: http://acm.hdu.edu.cn/showproblem.php? PID = 1, 6229 Reference question: 78452558 Https://www.cnblogs.com/cxhscst2/p/8215717.html 1 #include ACM-ICPC 2017 Shenyang Division Field Competition M. Wandering robots HDU 6229

$\triangle{aqb}$ $AC $ for the axis of symmetry, linked $QP $. Yi $\triangle{aqp}$ is a positive triangle $\rightarrow \TRIANGLE{APD} \cong \triangle{pqb} \rightarrow PB = AD = bc$, the same as the certificate $PC = bc$.$\triangle{abc}$, $\angle{bac} = 40^{\circ}$, $\angle{abc} = 60^{\circ}$, $D $ and $E $ respectively are sides $AC $ and $AB $ on the point, making $\angle {CBD} = 40^{\circ}$, $\ANGLE{BCE} = 70^{\circ}$, $F $ is the intersection of $BD $ and $CE $. Verification: $AF \perp bc$.

Bzoj [2017 provincial team 10 join test promotion competition 1] (4765 4766 4767), bzoj4765 Bzoj 4765 -- multipart + dfs sequence + tree array: Consider chunks. Set ~ N is divided into sqrt (n) blocks, and the number of its ancestors in each block is recorded for each vertex. modify a vertex to enumerate each shard and modify it. When querying [l, r], if a block is in [l, r], add it to the answer directly

Bzoj [2017 provincial team 10 join test promotion competition 1] (4765 4766 4767), bzoj4765 Bzoj 4765 -- multipart + dfs sequence + tree array: Consider chunks. Set ~ N is divided into sqrt (n) blocks, and the number of its ancestors in each block is recorded for each vertex. modify a vertex to enumerate each shard and modify it. When querying [l, r], if a block is in [l, r], add it to the answer directly