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考虑到 P * Q = P Q,而常量又和变量形式上等价,为了方便玩家理解, 将 ExprValidator 修改为允许常数和常数相邻,或常数和变量相邻。
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考虑到 P * Q = P Q,而常量又和变量形式上等价,为了方便玩家理解, 将 ExprValidator 修改为允许常数和常数相邻,或常数和变量相邻。