Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:13:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<adj[node].size();i++) ~^~~~~~~~~~~~~~~~~ main.cpp: In function 'void dfs2(int, int)': main.cpp:25:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<adj[node].size();i++) ~^~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:80:17: warning: 'nd' may be used uninitialized in this function [-Wmaybe-uninitialized] g<<2*dist[nd]-mx; ~~~~~~~^