摘要：
Description 已知N，求phi(N) Solution 数据范围非常大所以分解质因数做，Pollard rho+Miller Rabin的板子 阅读全文
摘要：
Description Eric has a long rope whose length is N, now he wants to mark on the rope with different colors. The way he marks the rope is:1. He will ch 阅读全文