View Compilation Error

0_0_18043884_15699.cpp: In function 'bool dfs(int)':
0_0_18043884_15699.cpp:30:19: error: request for member 'x' in 'a', which is of non-class type 'node [366025]'
             vis[a.x][a.y]=1;
                   ^
0_0_18043884_15699.cpp:30:24: error: request for member 'y' in 'a', which is of non-class type 'node [366025]'
             vis[a.x][a.y]=1;
                        ^