12801280 SUSTech Online Judge
This problem is in Contest(s) below:
Contest 1126:CS203 2022 Fall Lab 7 Advanced Tree
Contest 1127:CS217 2022 Fall Lab 7 Advanced Tree
Contest 1058:2019Fall_DSAA_Lab6_Tree
Contest 1069:2020 Spring Lab7
Contest 1148:CS203 2023 Fall Lab 6 Tree
Contest 1085:2020 Fall Lab07 Tree