Visible Trees Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 3131 Accepted Submission(s): 1387 Problem Description There are many trees forming a m * n grid, the grid starts from (1,1). Far…
A. Oath of the Night's Watch time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output "Night gathers, and now my watch begins. It shall not end until my death. I shall take no wife, hold no lands,…
Description There is a rectangular room, covered with square tiles. Each tile is colored either red or black. A man is standing on a black tile. From a tile, he can move to one of four adjacent tiles. But he can't move on red tiles, he can move only…