You are given a map in form of a two-dimensional integer grid where 1 represents land and 0 represents water. Grid cells are connected horizontally/vertically (not diagonally). The grid is completely surrounded by water, and there is exactly one i...
select (select name from user where user.uid = c.uid) as replyer,(select name from user where user.uid = c.to_uid) as replyed,c.contentfrom comment cwhere id=1