Compilare: user.cpp: In function ‘void bellman()’: user.cpp:40:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < a[nod].size(); i++) { ^ user.cpp: In function ‘bool BF()’: user.cpp:67:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < a[nod].size(); i++) { ^ user.cpp: In function ‘int maxflow()’: user.cpp:91:9: warning: unused variable ‘flow’ [-Wunused-variable] int flow = 0, costflow = 0; ^