tokitsukaze > 标签 dp dp hdu 6447 YJJ's Salesman (dp+树状数组) 2018牛客网暑期ACM多校训练营(第一场)E.Removal (dp) Codeforces edu#46 D.Yet Another Problem On a Subsequence (dp) Codeforces Round#490 div3F Cards and Joy (01背包)