Compilare: main.cpp: In function 'long long int divide(std::vector<long long int>, std::vector<long long int>, long long int)': main.cpp:61:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<a.size(); i++) { ~^~~~~~~~~ main.cpp: In member function 'char InParser::read_ch()': main.cpp:15:31: 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, 131072, fin); ^