Compilare: user.cpp: In function ‘void Bfs()’: user.cpp:41:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<G[e.cur].size();++i) ^ user.cpp:42:12: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if (G[e.cur][i]!=e.prec) ^ user.cpp: In function ‘void Read()’: user.cpp:17:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("statiuni.in","r",stdin); ^ user.cpp:18:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&k); ^ user.cpp:21:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&x,&y); ^ user.cpp: In function ‘void Write()’: user.cpp:61:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("statiuni.out","w",stdout); ^