Compilare: user.cpp: In function ‘void df1(int)’: user.cpp:13:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<v[x].size();j++)if(viz[v[x][j]]==0)df1(v[x][j]); ^ user.cpp: In function ‘void df(int)’: user.cpp:22:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<t[x].size();j++)if(viz[t[x][j]]==0)df(t[x][j]); ^ user.cpp: In function ‘void afisare()’: user.cpp:46:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<sol[i].size();j++)printf("%d ",sol[i][j]); ^