Compilare: user.cpp: In function ‘int main()’: user.cpp:90:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (aux.s.size() < K) Q.push(A[i][j]); ^ user.cpp:104:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < V[i].s.size(); j++) ^ user.cpp:112:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < V.size(); i++) ^