Compilare: main.cpp: In member function 'void InputReader::adv()': main.cpp:21:54: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(buff, sizeof(char), BUFF_SIZE, fin); ^ main.cpp: In function 'int main()': main.cpp:78:32: warning: 'dr' may be used uninitialized in this function [-Wmaybe-uninitialized] fout << st << ' ' << dr << ' ' << maxim << '\n'; ^~~ main.cpp:78:19: warning: 'st' may be used uninitialized in this function [-Wmaybe-uninitialized] fout << st << ' ' << dr << ' ' << maxim << '\n'; ^~~