Compilare: user.cpp: In function ‘int main()’: user.cpp:21:11: warning: unused variable ‘j’ [-Wunused-variable] int i, j; ^ user.cpp: In function ‘void dfsG(int)’: user.cpp:54:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<G[k].size(); i++) ^ user.cpp: In function ‘void dfsGT(int)’: user.cpp:64:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<GT[k].size(); i++) ^ user.cpp: In function ‘void afisare()’: user.cpp:76:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<sol[i].size();j++) ^