codeforces 788C The Great Mixing (bitset优化dp、bfs)
题目原文http://codeforces.com/problemset/problem/788/CSashaandKolyadecidedtogetdrunkwithCoke,again.ThistimetheyhavektypesofCoke.i-thtypeischaracterisedbyitscarbondioxideconcentration.Today,onthepartyinhon