Compilare: main.cpp: In function 'void go_visit(int, int)': main.cpp:22:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<nod[pos].size();i++) ~^~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:113:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int g=0;g<it->second.size();g++) ~^~~~~~~~~~~~~~~~~~