Compilare: user.cpp: In function ‘int main()’: user.cpp:70:32: warning: deprecated conversion from string constant to ‘char*’ [-Wwrite-strings] InputReader cin("srevni.in"); ^ user.cpp: In constructor ‘InputReader::InputReader(char*)’: user.cpp:13:39: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(str, 1, BUFFER_SIZE, in); ^ user.cpp: In member function ‘void InputReader::advance()’: user.cpp:41:43: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(str, 1, BUFFER_SIZE, in); ^