Compilare: user.cpp: In function ‘int main()’: user.cpp:103:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < graph.size(); i++) ^ user.cpp:117:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < graph_final.size();i++) ^ user.cpp:88:18: warning: unused variable ‘j’ [-Wunused-variable] int i, x, y, c, j; ^