Accepted
/in/foo.cc: In function 'int main()':
/in/foo.cc:60:8: warning: variable 'o' set but not used [-Wunused-but-set-variable]
dian o = c[q.front()];
^
/in/foo.cc: In function 'int main()':
/in/foo.cc:60:8: warning: variable 'o' set but not used [-Wunused-but-set-variable]
dian o = c[q.front()];
^
