Compilare: main.cpp: In function 'int main()': main.cpp:44:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<arbori[muchii[i].second.second].size();++j) ~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:54:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<arbori[muchii[i].second.first].size();++j) ~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:69:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v.size();++i) ~^~~~~~~~~