Accepted
/in/foo.cc: In function 'void bfs()':
/in/foo.cc:29:8: warning: unused variable 'ans' [-Wunused-variable]
ll ans=0;
^~~
/in/foo.cc: In function 'void bfs()':
/in/foo.cc:29:8: warning: unused variable 'ans' [-Wunused-variable]
ll ans=0;
^~~
