View Compilation Error

0_0_25606892_30961.cpp:15:23: error: array bound is not an integer constant before ']' token
 int vis[105][105][maxn];
                       ^
0_0_25606892_30961.cpp: In function 'int bfs()':
0_0_25606892_30961.cpp:22:2: error: 'vis' was not declared in this scope
  vis[s.x][s.y][s.key]=1;
  ^
0_0_25606892_30961.cpp: In function 'int main()':
0_0_25606892_30961.cpp:60:10: error: 'vis' was not declared in this scope
   memset(vis,0,sizeof(vis));
          ^