Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:18:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < L[nod].size(); i ++) ^ user.cpp:32:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i < D[nod].size() && (D[nod][i - 1] + D[nod][i] > k || D[nod][i] > k)) ^ user.cpp:37:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i < D[nod].size()) ^