乐逍遥xwl

摘要： Educational Codeforces Round 69 (Rated for Div. 2) C - Array Splitting You are given a sorted array a1,a2,…,an (for each index i>1 condition ai≥ai−1 h 阅读全文

摘要： Educational Codeforces Round 69 (Rated for Div. 2) B - Pillars There are n pillars aligned in a row and numbered from 1 to n. Initially each pillar co 阅读全文

摘要： Educational Codeforces Round 69 (Rated for Div. 2) A - DIY Wooden Ladder Let's denote a k-step ladder as the following structure: exactly k+2 wooden p 阅读全文