字符串方程

instemast

s + "abc" = "xyzabc", 求s

s + t + "a" = "ababa"
s + "a" + t = "ababa"
求 s, t

定义 k * str = str + str + ... + str (k个相加)

3s + 2t = "aaaaaaaa"
2s + t = "aaaaa"
求 s, t

creamy_mami

毛巴马。。。

游戏阿家

哈哈哈....