CodeforcesCodeforces Round 1039 (Div. 2)Codeforces Round 1039 (Div. 2)本节提供 Codeforces Round 1039 (Div. 2) 的题解。A. Recycling Center B. Deque Process D. Sum of LDS E1. Submedians (Easy Version) E2. Submedians (Hard Version)