Compilare: user.cpp: In function ‘bool BFS()’: user.cpp:23:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0; j<graf[nod].size(); j++){ ^ user.cpp: In function ‘int main()’: user.cpp:49:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<graf[N].size(); i++){ ^ user.cpp:36:36: 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:37:38: 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:38:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&N,&M); ^ user.cpp:42:35: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d",&x,&y,&c); ^