Compilare: main.cpp: In function 'void dfs(int)': main.cpp:38:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<fii[node].size();i++) ~^~~~~~~~~~~~~~~~~ main.cpp:44:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<fii[node].size();i++) ~^~~~~~~~~~~~~~~~~ main.cpp:51:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<fii[node].size();i++) ~^~~~~~~~~~~~~~~~~