View Compilation Error

0_0_35066659_15727.cpp: In function 'void bfs()':
0_0_35066659_15727.cpp:31:23: error: 'x' was not declared in this scope
    if(dis[tx][ty]>dis[x][y]+ar[tx][ty]){
                       ^
0_0_35066659_15727.cpp:31:26: error: 'y' was not declared in this scope
    if(dis[tx][ty]>dis[x][y]+ar[tx][ty]){
                          ^