Educational Codeforces Round 159 (Rated for Div. 2)

■A. Binary Imbalance
"111111"ならダメ
■B. Getting Points
最終日から出席をする二分探索
■C. Insert and Equalize
差のgcdを取って適当に
■D. Robot Queries
lower_boundを左右から適当に
■E. Collapsing Strings
Trie木
■F. Trees and XOR Queries Again
HLD*SparseTable