Compilare: main.cpp: In function 'void verif(int, std::pair<int, int>)': main.cpp:74:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<hs[cod].size(); ++i) { ~^~~~~~~~~~~~~~~ main.cpp: In member function 'char InParser::read_ch()': main.cpp:18:29: 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, 4096, fin); ^