Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:37:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[ x ].size();i++) ^ user.cpp: In function ‘void defeseu(int)’: user.cpp:74:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<V[ x ].size(); i++) ^ user.cpp: In function ‘void ham(int, int, int)’: user.cpp:130:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<l[B].size(); i++) ^ user.cpp:154:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<l[B].size(); i++) ^ user.cpp: In function ‘bool in(int, int)’: user.cpp:165:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<l[bico].size(); i++) ^