Compilare: user.cpp: In function ‘void HPD(int, int)’: user.cpp:42:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < g[x].size(); ++i) { ^ user.cpp:55:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < g[x].size(); ++i) { ^ user.cpp: In function ‘void set_path_level(int, int)’: user.cpp:91:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < g[x].size(); ++i) { ^ user.cpp: In function ‘void HPD(int, int)’: user.cpp:18:20: warning: ‘max_path’ may be used uninitialized in this function [-Wmaybe-uninitialized] whatPath[x] = p; ^ user.cpp:39:27: note: ‘max_path’ was declared here int max_size = 0, max_path; ^