Compilare: user.cpp: In function ‘int main()’: user.cpp:15:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < n; ++i) { ^ user.cpp:24:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < n; ++i) { ^ user.cpp:33:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i >= k && values[dq.front()] > max_value) { ^ user.cpp:40:19: warning: ‘max_ind’ may be used uninitialized in this function [-Wmaybe-uninitialized] out << max_ind-k+2 << ' ' << max_ind+1 << ' ' << max_value << '\n'; ^