Compilare: user.cpp: In function ‘void DF_pl(long int)’: user.cpp:23:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<G[nod].sz();i++) ^ user.cpp: In function ‘void DF_mn(long int)’: user.cpp:34:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<G[nod].sz();i++) ^ user.cpp: In function ‘int main()’: user.cpp:80:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<comps.sz();i++) ^ user.cpp:82:45: warning: format ‘%ld’ expects argument of type ‘long int’, but argument 2 has type ‘std::vector<int>::size_type {aka unsigned int}’ [-Wformat=] printf("%ld ",comps[i].sz() ); ^ user.cpp:84:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0;j<comps[i].sz();j++) printf("%d ",comps[i][j]); ^ user.cpp:40:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("retele.in","r",stdin); ^ user.cpp:41:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("retele.out","w",stdout); ^ user.cpp:43:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%ld %ld",&n,&m); ^ user.cpp:47:39: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%ld %ld",&x,&y); ^