Compilare: user.cpp: In function ‘long int getLong()’: user.cpp:18:28: warning: array subscript has type ‘char’ [-Wchar-subscripts] while(!isDigit(Buff[pos])) { ^ user.cpp:26:27: warning: array subscript has type ‘char’ [-Wchar-subscripts] while(isDigit(Buff[pos])) { ^ user.cpp:27:25: warning: array subscript has type ‘char’ [-Wchar-subscripts] Ans = Buff[pos++] - '0'; ^ user.cpp: In function ‘void startDfs(long int, long int)’: user.cpp:79:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(long i=0;i<list[nod].size();i++){ ^ user.cpp: In function ‘long int getLCA(long int, long int)’: user.cpp:113:19: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] for(long pas=1<<maxLog-2;pas;pas>>=1,pasL--){ ^ user.cpp: In function ‘long int getLong()’: user.cpp:22:39: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(Buff,1,maxBuf,stdin); ^ user.cpp:30:39: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(Buff,1,maxBuf,stdin); ^ user.cpp: In function ‘int main()’: user.cpp:140:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("disconnect.in","r",stdin); ^ user.cpp:141:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("disconnect.out","w",stdout); ^ user.cpp:142:31: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(Buff,1,maxBuf,stdin); ^