Compilare: user.cpp: In function ‘std::tuple<int, int> parallelDFS(int, int)’: user.cpp:101:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (nxt[x] < edg[x].size() and oki[edg[x][nxt[x]]]) ~~~~~~~^~~~~~~~~~~~~~~ user.cpp:103:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (nxt[x] < edg[x].size()) ~~~~~~~^~~~~~~~~~~~~~~ user.cpp: In member function ‘char InParser::read_ch()’: user.cpp:14:38: 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); ^