Compilare: user.cpp: In function ‘void DFST(int)’: user.cpp:14:44: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < vf_transpus[x].size(); i++){ ^ user.cpp: In function ‘void DFS(int)’: user.cpp:25:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < vf[x].size(); i++){ ^ user.cpp: In function ‘int main()’: user.cpp:36:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j, x, y; ^