Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:37:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<gr[nod].size();i++) ~^~~~~~~~~~~~~~~ main.cpp: In function 'void dfs2(int, int)': main.cpp:51:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<gr[node].size();i++) ~^~~~~~~~~~~~~~~~ main.cpp:59:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<ant[node].size();i++) ~^~~~~~~~~~~~~~~~~