Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:149:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (v[fth[vecin]].size() > maxi) ~~~~~~~~~~~~~~~~~~~~~^~~~~~ main.cpp:161:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (v[nod].size() > maxi){ ~~~~~~~~~~~~~~^~~~~~ main.cpp: In member function 'char InParser::read_ch()': main.cpp:29:29: 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); ^