Compilare: main.cpp: In function 'void dfs(int)': main.cpp:17:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<nod[x].size(); i++) ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:37:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<rnod[x].size(); j++) ~^~~~~~~~~~~~~~~ main.cpp:45:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<ans.size(); i++) g << ans[i] << ' '; ~^~~~~~~~~~~