Compilare: main.cpp: In function 'int main()': main.cpp:53:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<s[i].size(); ++j) ~^~~~~~~~~~~~ main.cpp: In function 'void DFS(int, int)': main.cpp:77:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<G[nod].size(); ++i) ~^~~~~~~~~~~~~~ main.cpp:82:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<GT[nod].size(); ++i) ~^~~~~~~~~~~~~~~