Compilare: user.cpp: In function ‘int Dijkstra(std::vector<std::vector<std::pair<int, int> > >)’: user.cpp:41:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 1; i < g.size(); ++i){ ^ user.cpp:56:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < g[u].size(); ++j){ ^ user.cpp: In function ‘int main()’: user.cpp:71:25: warning: variable ‘k’ set but not used [-Wunused-but-set-variable] int n, m, i, x, y, gi, k; ^