目录介绍声明代码实现思路分析总结介绍 众所周知，整数在C和C++中以int ，long，long long三种不同大小的数据存储，数据大小最大可达2^64，但是在实际使用中，我们仍不可避免的会遇到爆long long的超大数运算，
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