codeforces 2200左右的DS题 题目列表 AI robots Mahmoud and Ehab and the function Beard Graph 80-th Level Archeology Broken BST Letters Removing Kuro and GCD and XOR and SUM Multidimensional Queries New Year Domino Voting (Easy Version) Boredom Count The Rectangles Addition Robot Beautiful Subarrays Leaving the Bar Time to Raid Cowavans DNA Evolution A Heap of Heaps Sum of Medians Yaroslav and Divisors High Cry Minimal Segment Cover Permutation Separation Closest Equals Let Them Slide Great Vova Wall (Version 2) Subarray Sorting Mahmoud and a xor trip Tokitsukaze and Strange Rectangle Lipshitz Sequence Antenna Coverage Pillars Friends and Subsequences The Bakery Duff in the Army Processing Queries Almost Difference Ant colony Circular RMQ Xenia and Tree Diverging Directions Cannon Maze 2D Bug in Code Chip Play Petya and Post Anniversary Zebra Tower Big Maximum Sum Castle Defense