Compilare: user.cpp: In function ‘int main()’: user.cpp:40:54: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(d[a]==0) {for(int j=0;j<v[a].v.size();j++) h.push_back(v[a].v[j]);viz[a]=1;} ^ user.cpp:41:54: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if(d[b]==0) {for(int j=0;j<v[b].v.size();j++) h.push_back(v[b].v[j]);viz[b]=1;} ^ user.cpp:57:50: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i< v[arc.destinatie].v.size(); i++) ^