View Compilation Error

0_0_14567611_6367.cpp: In function 'int bfs(int, int, int)':
0_0_14567611_6367.cpp:63:47: error: 'check' was not declared in this scope
    if(!vis[q.x][q.y][q.z] && check(q.x,q.y,q.z))
                                               ^
0_0_14567611_6367.cpp:67:20: error: 'abs' was not declared in this scope
      if(abs(q.x-a+1) + abs(q.y-b+1) + abs(q.z-c+1) + q.step > t)
                    ^