2021.1.10寒假打卡Day7哈尔滨学院2021ACM冬令营训练赛（一）
哈尔滨学院2021ACM冬令营训练赛（一）A. Short SubstringsAlice guesses the strings that Bob made for her.At first, Bob came up with the secret string a consisting of lowercase English letters. The string a has a length of 2 or more characters. Then, from string a he
