题目链接http://codeforces.com/contest/985/problem/D题目You are going to the beach with the idea to build the greatest sand castle ever in your head! The beach is not as three-dimensional as you could hav...
题目链接http://codeforces.com/contest/985/problem/C题目You have m = n·k wooden staves. The i-th stave has length ai. You have to assemble n barrels consisting of k staves each, you can use any k staves t...
题目链接http://codeforces.com/contest/985/problem/B题目You are given n switches and m lamps. The i-th switch turns on some subset of the lamps. This information is given as the matrix a consisting of n r...
题目链接http://codeforces.com/contest/985/problem/A题目You are given a chessboard of size $1 × n$. It is guaranteed that n is even. The chessboard is painted like this: "BWBW...BW".Some cells of the boar...
题解链接题目链接https://arc061.contest.atcoder.jp/tasks/arc061_b题目Problem StatementWe have a grid with $H$ rows and $W$ columns. At first, all cells were painted white.Snuke painted N of these cells. The $...