Compilare: main.cpp: In function 'int main()': main.cpp:36:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(dq.size()>=L&&dq.size()<=U) ~~~~~~~~~^~~ main.cpp:36:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(dq.size()>=L&&dq.size()<=U) ~~~~~~~~~^~~ main.cpp:42:29: warning: logical not is only applied to the left hand side of comparison [-Wlogical-not-parentheses] while(!dq.size()>U) dq.pop_front(); ^