nexthexonextbutterflyvolantisyearnyiliashokaindigoapollolandscapecactusmateryicarusfluidmaterial
转移自老blog
cf777C
链接
http://codeforces.com/problemset/problem/777/C
题意
给你一个矩阵,多组询问,问只保留第i行到第j行删除其他行后得到的矩阵,是否存某列单调不减,
题解...
more...