Compilare: main.cpp: In function 'void verif(int, std::pair<int, int>)': main.cpp:48:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<hs[cod].size(); ++i) { ~^~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:56:29: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings] si.open_file("ograzi.in"); ^ main.cpp: In member function 'char InParser::read_ch()': main.cpp:15:38: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(buffer, 1, 4096, f); ^