Compilare: main.cpp: In function 'int main()': main.cpp:55:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<L[x].size();i++){ ~^~~~~~~~~~~~ main.cpp:63:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<L[nod].size();i++){ ~^~~~~~~~~~~~~~ main.cpp:71:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j=0;j<L[vecin].size();j++){ ~^~~~~~~~~~~~~~~~