Compilare: user.cpp: In function ‘int main()’: user.cpp:49:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i< v[1].v.size(); i++) ^ user.cpp:67:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i< v[arc.destinatie].v.size(); i++) ^ user.cpp:33:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j, n, m, a, b, c; ^