Codeforces Round 1080 (Div. 3) – 5 Problems Solved This round had a strong mix of math, constructive reasoning, DP, and geometry-based problem solving. I was able to solve: A. Sieve of Erato67henes – ...

// 证明过程 https://phqghume.github.io/2018/05/19/%E8%87%AA%E9%80%82%E5%BA%94%E8%BE%9B%E6%99%AE%E6%A3%AE%E6%B3%95/ // 模板题 https://www.luogu.com.cn/problem ...

💥 From 1000 to 1600 on CodeForces: A Step-by-Step Playbook for Beginners in CP 💥 Aiming to reach a 1600 rating on Codeforces? You’re not alone. This is the first major leap that turns you from a ...

/*Little Petya often travels to his grandmother in the countryside. The grandmother has a large garden, which can be represented as a rectangle 1 × n in size, when viewed from above. This rectangle is ...