Compilare: user.cpp: In function ‘void belman_ford()’: user.cpp:23:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = 0 ; j < vf[z].size(); j++){ ^ user.cpp: In function ‘int main()’: user.cpp:4:23: warning: integer overflow in expression [-Woverflow] #define INF (1<<31) - 1 ^ user.cpp:41:23: note: in expansion of macro ‘INF’ distanta[i] = INF; ^