int main(){
int i,n,m=0,p,q;
scanf("%d",&n);
for(i=0;m<500000&&i++<n;)scanf("%d%d",&p,&q),p-=q*30000,m=m<p?p:m;
puts(i-n-1?"YES":"NO");if(p=6,i-n-1)while(p--)printf("%d\n",i);
return 0;
}