Compilare: user.cpp: In function ‘void bellmanFord()’: user.cpp:632:18: warning: overflow in implicit constant conversion [-Woverflow] int cf = oo; ^ user.cpp:601:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j; ^ user.cpp: In function ‘bool bf()’: user.cpp:660:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[start].size();i++) ^ user.cpp: In function ‘bool b_ford()’: user.cpp:690:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[start].size();i++) ^ user.cpp: In function ‘void solve()’: user.cpp:711:7: warning: unused variable ‘i’ [-Wunused-variable] int i,aleg; ^ user.cpp:711:9: warning: unused variable ‘aleg’ [-Wunused-variable] int i,aleg; ^ user.cpp: In function ‘int main()’: user.cpp:740:16: warning: overflow in implicit constant conversion [-Woverflow] int ra=oo; ^ user.cpp: In function ‘void solve()’: user.cpp:719:31: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("bal2.out","w",stdout); ^