Compilare: user.cpp: In function ‘void componente()’: user.cpp:72:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j; ^ user.cpp: In function ‘int main()’: user.cpp:113:106: warning: left shift count >= width of type [enabled by default] for(i=1; i<=n; ++i) {x=a[i];while(x!=a[x]) aux=a[a[x]],a[x]=aux,x=aux;if(v[x]==0) xx+=sz[x]*(sz[x]-1)/2<<' ',v[x]=1;} ^