Compilare: user.cpp: In function ‘bool bfs(int, int)’: user.cpp:288:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<G[x].size();i++) ^ user.cpp: In function ‘bool bfs_t(int, int)’: user.cpp:315:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<GT[x].size();i++) ^ user.cpp: In function ‘void solve()’: user.cpp:339:12: warning: unused variable ‘nev’ [-Wunused-variable] int nev=0,j; ^ user.cpp:352:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<sol.size();i++) ^ user.cpp:335:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("drumuri5.out","w",stdout); ^ user.cpp: In function ‘void read()’: user.cpp:266:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("drumuri5.in","r",stdin); ^ user.cpp:268:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ user.cpp:271:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&x,&y); ^