Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:17:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<v[nod].size();j++) { ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:49:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < comp[i].size(); j++) ~~^~~~~~~~~~~~~~~~