Compilare: main.cpp: In function 'int main()': main.cpp:21:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0;j<v[1].size();j++) ~^~~~~~~~~~~~ main.cpp:37:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0;j<v[h.top().second].size();j++) ~^~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:46:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int t=0;t<val2.size();t++) ~^~~~~~~~~~~~