Wrong Answer
/in/foo.cc: In function 'int main()':
/in/foo.cc:90:9: warning: 's' may be used uninitialized in this function [-Wmaybe-uninitialized]
bfs(s);
^
/in/foo.cc: In function 'int main()':
/in/foo.cc:90:9: warning: 's' may be used uninitialized in this function [-Wmaybe-uninitialized]
bfs(s);
^
