Compilare: user.cpp: In function ‘void coboara(int)’: user.cpp:38:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (fiudr(p) < H.size()) { ^ user.cpp:55:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (fiust(p) < H.size() && H[p].first > H[fiust(p)].first) { ^ user.cpp: In function ‘void Dijkstra()’: user.cpp:86:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < G[a.second].size(); ++i) { ^ user.cpp:71:9: warning: unused variable ‘k’ [-Wunused-variable] int i, k, x, y, viz[Nmax] = { 0 }; ^