Compilare: main.cpp: In function 'int main()': main.cpp:22:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (dq.size() > k + 1){ ~~~~~~~~~~^~~~~~~ main.cpp:23:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = dq.size() -2; i >= dq.size() - k - 1; i--){ ~~^~~~~~~~~~~~~~~~~~~~ main.cpp:16:9: warning: unused variable 'i' [-Wunused-variable] int i = 0; ^