@[小粉兔](/user/10703)
by seantheone @ 2022-08-09 12:11:18
那我用SPFA过了是不是……
by Noby_Glds @ 2022-08-09 12:20:43
差分约束板子是绿题
by Disjoint_cat @ 2022-08-09 12:28:33
没必要用SPFA等
by LiaoYF @ 2022-08-09 12:44:08
@[seantheone](/user/456790) [本题可以 dijkstra。](https://atcoder.jp/contests/abc216/submissions/25448250)
by MatrixGroup @ 2022-08-17 20:58:53