Compilare: user.cpp: In function ‘int BF(std::vector<int>*)’: user.cpp:11:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] #define sz size() ^ user.cpp:39:32: note: in expansion of macro ‘sz’ for (j = 0; j < G[nod].sz; j++) ^ user.cpp: In function ‘int main()’: user.cpp:11:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] #define sz size() ^ user.cpp:101:36: note: in expansion of macro ‘sz’ for (i = 0; i < G[201].sz; i++) ^ user.cpp:54:24: warning: unused variable ‘x’ [-Wunused-variable] int i, flow, fmin, x, y, z, nod; ^ user.cpp:54:27: warning: unused variable ‘y’ [-Wunused-variable] int i, flow, fmin, x, y, z, nod; ^ user.cpp:54:30: warning: unused variable ‘z’ [-Wunused-variable] int i, flow, fmin, x, y, z, nod; ^