Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:31:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<L[nod].size();i++){ ~^~~~~~~~~~~~~~ main.cpp: In function 'void solve(int, int, int)': main.cpp:128:25: warning: 'mask_node' may be used uninitialized in this function [-Wmaybe-uninitialized] if (new_mask == mask_node){ ^~ main.cpp:143:35: warning: 'sol_mask1' may be used uninitialized in this function [-Wmaybe-uninitialized] solve (fiu1,nod,sol_mask1); ^