View Compilation Error

0_0_37876313_3111.cpp: In function 'void BFS(int, int, int, int, int)':
0_0_37876313_3111.cpp:69:35: error: return-statement with a value, in function returning 'void' [-fpermissive]
  if(!vis[xt][yt]){cout<<-1;return 0;}
                                   ^