Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:107:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i<graf[cur].size(); ++i) ~^~~~~~~~~~~~~~~~~ main.cpp: In function 'void dfsH(int, int)': main.cpp:153:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<graf[cur].size(); i++) ~^~~~~~~~~~~~~~~~~ main.cpp: In member function 'char InParser::read_ch()': main.cpp:17:29: 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); ^