Compilare: user.cpp: In function ‘bool _BF(int, int)’: user.cpp:26:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<G[nodx].size();++i) ^ user.cpp: In function ‘int main()’: user.cpp:53:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<G[n].size();++i) ^ user.cpp:50:14: warning: unused variable ‘nody’ [-Wunused-variable] int nodx,nody; ^ user.cpp:40:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("maxflow.in","r",stdin); ^ user.cpp:41:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("maxflow.out","w",stdout); ^ user.cpp:42:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&n,&m); ^ user.cpp:45:35: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d",&x,&y,&c); ^