Compilare: user.cpp: In function ‘void read()’: user.cpp:48:13: warning: variable ‘aux’ set but not used [-Wunused-but-set-variable] int i,x,aux; ^ user.cpp: In function ‘void bfs(int)’: user.cpp:98:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<TT[k].size();j++) ^ user.cpp: In function ‘void read()’: user.cpp:43:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("euler.in","r",stdin); ^ user.cpp:44:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("euler.out","w",stdout); ^ user.cpp:46:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:52:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&x); ^ user.cpp:59:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&x);if(x==EOF)break; ^