This problem is in Contest(s) below:
Contest 1242:2023暑期C++c2
Contest 1359:2024暑期37下c++2(平阳)
Contest 1375:2024秋季c++周日早c2(塘下)
Contest 1224:2023春周日晚C++二期(快)
Contest 1232:2023春周五晚c++第二期(平阳)
Contest 1176:2022秋周日早c++第二期
Contest 1177:2022秋周日晚c++第二期
Contest 1207:2023春周六早c++二期(慢)
Contest 1164:2022暑期246晚c++第二期
Contest 1159:2022暑期246早c++第二期
Contest 1407:2025春周六早c++1(平阳)
Contest 1368:2024秋周六早c1(平阳)