14701470 SUSTech Online Judge
This problem is in Contest(s) below:
Contest 1109:CS203 2021 Fall Lab 10 Advanced Graph
Contest 1110:CS217 2021 Fall Lab 10 Advanced Graph
Contest 1130:CS203 2022 Fall Lab 9 Advanced Graph
Contest 1131:CS217 2022 Fall Lab 9 Advanced Graph
Contest 1157:CS203 2023 Fall Lab 9 Advanced Graph