Compilare: user.cpp: In function ‘void visit(int)’: user.cpp:46:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i < G[node].size(); ++i) ~~^~~~~~~~~~~~~~~~ user.cpp: In function ‘void create_Strongly_Conn_Component(int, int)’: user.cpp:54:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i < Gt[node].size(); ++i) { ~~^~~~~~~~~~~~~~~~~ user.cpp: In function ‘void Write()’: user.cpp:69:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j < Sol[i].size(); j++) ~~^~~~~~~~~~~~~~~