Compilare: main.cpp: In function 'int main()': main.cpp:79:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0;j<v[1].size();j++) ~^~~~~~~~~~~~ main.cpp:95:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0;j<v[h.top().second].size();j++) ~^~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:104:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int t=0;t<val2.size();t++) ~^~~~~~~~~~~~ main.cpp: In member function 'char InParser::read_ch()': main.cpp:20:29: 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); ^