Compilare: user.cpp: In function ‘bool BF()’: user.cpp:20:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < a[nod].size(); j++) ^ user.cpp: In function ‘int main()’: user.cpp:45:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < a[n].size(); i++) ^ user.cpp:3:13: warning: overflow in implicit constant conversion [-Woverflow] #define INF 10000000000 ^ user.cpp:50:24: note: in expansion of macro ‘INF’ int fmin = INF; ^