Compilare: user.cpp: In function ‘void bfs(int, int)’: user.cpp:27:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v[k].size(); i++) ^ user.cpp: In function ‘int flow(int, int)’: user.cpp:47:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v[dest].size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:94:9: warning: unused variable ‘dbg’ [-Wunused-variable] int dbg = 1; ^ user.cpp:134:9: warning: unused variable ‘x’ [-Wunused-variable] int x = flow (0, d);/* ^