Compilare: user.cpp: In function ‘int main()’: user.cpp:18:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 1; i <= n && q.size() < k; i++) ^ user.cpp:21:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] &&(n - q.size()) + 1 > k) ^ user.cpp:27:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(q.size() < k) ^ user.cpp:14:12: warning: variable ‘p’ set but not used [-Wunused-but-set-variable] int i, p; ^