int main(){
int i,n,m,p,q;
scanf("%d",&n);
for(i=0;i<n&&m<500000;i++)scanf("%d%d",&p,&q),p-=q*30000,m=m<p?p:m;
p=6;if(puts(i-n?"YES\n":"NO")>2)while(p--)printf("%d",i-1);
return 0;
}