摘要:
$\text{Description}$ $\text{Given a number }p(p\leqslant10^7).$ $\text{Output }2^{2^{2^{2^{\cdots}}}}\bmod p.$ $\text{Method}$ $\text{Use ex-Euler's T 阅读全文
摘要:
$\text{Description}$ $\text{Given a number }L(L\leqslant 2,000,000,000),\text{find a number }x,\text{ so that }L|8\times(10^x-1)/9.$ $\text{Output the 阅读全文