Building 5G antennas dfs 剪枝 要字典序最小，显然第一个点就是 \(1\)，后面考虑走 \(k\) 步后能到达的点集中选一个字典序最小的，重复该过程 考虑 \(set[i][j]\) 表示第 \(i\) 号点当前能走 \(j\) 步所包含的点的集合，我们可以发现对于相同的点，如果 \(j_1 > j_2\)，显然有 \(set[i][j_1]
洛谷传送门 CF 传送门 思路 边权为 \(1\) 的最短路问题，可使用 BFS 求解。当目前搜到点 \(u\) 时，瓶颈在于找出所有边 \(u \to v\)，若 \(v\) 没被访问过就入队。 下面的部分和 [JOISC2020] 治療計画 有点像。考虑先拆限制中的绝对值。 若 \(u < v\) ，则 \(v - u \le p_u\) 且 \(v -
目录 Elevation and AzimuthAODAOA Elevation and Azimuth Elevation angle（仰角）和Azimuth angle（方位角）用于定位，示意图如下： AOD With Angle of Departure measurement, a device with multiple antennas (Device A) sends the signal using multiple antennas(an antenn
Antenna Placement Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 6445 Accepted: 3182 Description The Global Aerial Research Centre has been allotted the task of building the fifth generation of mobile phone nets in Sweden. The most st
Antenna Placement Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 6334 Accepted: 3125 Description The Global Aerial Research Centre has been allotted the task of building the fifth generation of mobile phone nets in Sweden. The m
