Compilare: main.cpp: In function 'int main()': main.cpp:38:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0;i < v.size();++i) ~~^~~~~~~~~~ main.cpp:43:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (dq.size() > u) ~~~~~~~~~~^~~ main.cpp:48:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (dq.size() >= l) ~~~~~~~~~~^~~~