Compilare: user.cpp: In function ‘int main()’: user.cpp:30:12: warning: unused variable ‘j’ [-Wunused-variable] int m, i, j, x, y, c, flux, f; ^ user.cpp: In function ‘int BFS()’: user.cpp:75:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < v[nod].size(); ++i) { ^ user.cpp:66:9: warning: unused variable ‘j’ [-Wunused-variable] int i, j, nod,x; ^