View Compilation Error

0_0_31708567_21267.cpp: In function 'void bfs(int, int)':
0_0_31708567_21267.cpp:42:9: error: 'pii' was not declared in this scope
         pii tmp=q.front();
         ^
0_0_31708567_21267.cpp:44:16: error: 'tmp' was not declared in this scope
         if(vis[tmp.first][tmp.second]) continue;
                ^
0_0_31708567_21267.cpp:45:13: error: 'tmp' was not declared in this scope
         vis[tmp.first][tmp.second]=1;
             ^