This is really good, it was originally in Russian, by Max Ivanov. Another site that now offers some interactive leetcode-like functionality is USACO (The United

This is really good, it was originally in Russian, by Max Ivanov. Another site that now offers some interactive leetcode-like functionality is USACO (The United States of America Computing Olympiad)[1]. Among other guides, they reference Competitive Programmer's Handbook (CPH) by Antti Laaksonen[2](PDF) https://usaco.guide/ https://usaco.guide/ https://usaco.guide/CPH.pdf https://usaco.guide/CPH.pdf