树的边权 = 1
by mbooboo @ 2024-04-09 21:14:04
m 和 k 已知
by mbooboo @ 2024-04-09 21:14:51
其实这种问题去**学术版**逛逛比灌水区更容易找到答案
by zzx1228 @ 2024-04-09 21:19:27