11751175 SUSTech Online Judge
This problem is in Contest(s) below:
Contest 1056:2019Fall_DSAA_Lab4_Stack_and_Queue
Contest 1066:2020 Spring Lab5
Contest 1143:CS203 2023 Fall Lab 4 Stack/Queue
Contest 1033:(autumn)DSAA lab 4
Contest 1043:spring_dsaa_lab4