Compilare: user.cpp: In function ‘void match(int)’: user.cpp:57:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<G[nod].size();++i) ^ user.cpp: In function ‘void Solve()’: user.cpp:77:33: warning: ‘memset’ used with constant zero length parameter; this could be due to transposed parameters [-Wmemset-transposed-args] memset(viz,sizeof(viz),0); ^ user.cpp: In function ‘void Read()’: user.cpp:17:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("paznici.in","r",stdin); ^ user.cpp:19:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ user.cpp:23:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s",s); ^ user.cpp: In function ‘void Write()’: user.cpp:98:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("paznici.out","w",stdout); ^