정답 개수:
74
틀린 개수:
26
실행 실패 개수:
0
4 push_front 94 pop_back push_front 599 push_back 388
-1
94
6 push_front 39 pop_front pop_front size back size
39 -1 0 39 0
39 -1 0 -1 0
5 push_front 236 push_front 347 push_front 8 pop_back push_front 214
236