Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:16:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[nod].size();i++) ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:38:40: warning: iteration 100004 invokes undefined behavior [-Waggressive-loop-optimizations] for(int i=1;i<=NMAX;i++) ver[i]=0; ~~~~~~^~ main.cpp:38:22: note: within this loop for(int i=1;i<=NMAX;i++) ver[i]=0; ~^~~~~~