14471447 SUSTech Online Judge
This problem is in Contest(s) below:
Contest 1102:CS217 2021 Fall Lab 06 String
Contest 1101:CS203 2021 Fall Lab 06 String
Contest 1122:CS203 2022 Fall Lab 5 String
Contest 1123:CS217 2022 Fall Lab 5 String
Contest 1144:CS203 2023 Fall Lab 5 String