Compilare: main.cpp: In function 'void dfs(int)': main.cpp:19:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<graf[nod].size(); i++) ~^~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:46:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<graf[i].size(); j++) ~^~~~~~~~~~~~~~~ main.cpp:65:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<vans.size(); i++) ~^~~~~~~~~~~~