Compilare: main.cpp: In function 'int main()': main.cpp:73:43: warning: unused variable 'ldr' [-Wunused-variable] long long madr = 0, nr_not_chose = 0, ldr = 0; ^~~ main.cpp: In member function 'void InputReader::advance()': main.cpp:40:51: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(buffer, SIZE, 1, input_file); ^ main.cpp: In constructor 'InputReader::InputReader(const char*)': main.cpp:18:47: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(buffer, SIZE, 1, input_file); ^