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Problem: The Limitations of Traditional Car Keys
In the European and American markets, physical car keys have long been a source of frustration. Whether you’re a car owner juggling bulky remotes, fobs…
目录质数
约数
欧拉函数
快速幂
扩展欧几里得算法
组合数
博弈论质数
分解质因数
一个数最小的因子一定是质数。for (int i = 2; i <= x / i; i ++ )if (x % i == 0){int s = 0;while (x % i == 0) x /= i, s ++ ;c…
The Pain of Traditional Keys: Why Your Garage and Pocket Deserve a Upgrade
In the age of smartphones and smart homes, traditional car keys feel increasingly outdated. Whether you’ve mislaid your physi…
Brownian Motion
Wiener Process
\(\newcommand{\E}{\mathbb{E}}\newcommand{\Var}{\text{Var}}\)我们熟悉作为离散随机过程的“随机游走”。这指的是:给定一列自然数下标的i.i.d.随机变量\(X_t\),其中\(X_t\)有\(1/…