11691169 SUSTech Online Judge
This problem is in Contest(s) below:
Contest 1112:CS203 2022 Fall Lab 0 Welcome Lab
Contest 1113:CS217 2022 Fall Lab 0 Welcome Lab
Contest 1030:(autumn)DSAA welcome lab
Contest 1040:spring_dsaa_lab1
Contest 1078:2020 Fall Welcome Lab
Contest 1133:CS203 2023 Fall Lab 0 Welcome Lab
Contest 1160:CS203 2024 Fall Lab 0 Welcome Lab