Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:24:31: 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:60:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<V[ x ].size();i++) ^ user.cpp: In function ‘void ham(int, int, int)’: user.cpp:101:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<l[B].size();i++) ^ user.cpp:131:26: 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:141:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<l[bico].size();i++) ^