14621462 SUSTech Online Judge
This problem is in Contest(s) below:
Contest 1127:CS217 2022 Fall Lab 7 Advanced Tree
Contest 1126:CS203 2022 Fall Lab 7 Advanced Tree
Contest 1150:CS203 2023 Fall Lab 7 Advanced Tree
Contest 1105:CS217 2021 Fall Lab 08 Advanced Tree
Contest 1106:CS203 2021 Fall Lab 08 Advanced Tree