题目链接: 传送门 Lawnmower time limit per test:2 second memory limit per test:256 megabytes Description You have a garden consisting entirely of grass and weeds. Your garden is described by an n × m grid, with rows numbered 1 to n from top to bottom, an…
题目描述 You have a garden consisting entirely of grass and weeds. Your garden is described by an n×mn×m grid, with rows numbered 11 to nn from top to bottom, and columns 11 to mm from left to right. Each cell is identified by a pair (r,c)(r,c)which mean…