codeforces 2000左右的dp题 题目列表 Yaroslav and Two Strings Pawn Insertion Sort Towers Two Strings Two out of Three Helga Hufflepuff's Cup Packmen New Year Letter Match & Catch Decoding Genome Work Group Treasure Hunting Cunning Gena Pathwalks Counting Arrays Wizards and Huge Prize Neko and Aki's Prank Sums of Digits Field expansion An overnight dance in discotheque Array Queries Bottles Array Without Local Maximums Running with Obstacles Looking for Order How many trees? Sergey and Subway Game of Stones Upgrading Array Lucky Tree Cashback Fibonacci-ish Pencils and Boxes Inna and Dima Hills Ciel and Duel Increasing Frequency Vasya and Beautiful Arrays Square Subsets Mahmoud and a Dictionary Famil Door and Brackets Gourmet choice Porcelain Lucky Common Subsequence