Compilare: main.cpp: In function 'long long int BF()': main.cpp:79:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0; j<G[nod].size(); j++) ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:105:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<G[n].size();i++) ~^~~~~~~~~~~~ main.cpp: In member function 'char InParser::read_ch()': main.cpp:14:29: 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); ^