Compilare: user.cpp: In function ‘void DFS(int)’: user.cpp:45:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<G[vf].size(); i++) ^ user.cpp: In function ‘void DFST(int)’: user.cpp:55:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<GT[vf].size(); i++) ^ user.cpp: In function ‘void afisare()’: user.cpp:66:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] {for (j=0; j<sol[i].size(); j++) ^