Compilare: main.cpp: In function 'void dfs(int)': main.cpp:12:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < v[nod].size(); ++j) ~~^~~~~~~~~~~~~~~ main.cpp:14:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < v[nod].size(); ++j) ~~^~~~~~~~~~~~~~~ main.cpp:21:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k = 0; k < v[vecin].size(); ++k) ~~^~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:57:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < ans.size(); ++i) ~~^~~~~~~~~~~~