/*
TASK:n23
LANG:C
*/
#include<stdio.h>
int main(){
int n,f,k,l,j;
long i,m;
scanf("%d",&n);
if  (n>12) 
    {
    printf("NO\n");
    return 0;
    }
for (i=2;i<2147483000;i++)
    {
    for (m=i,f=1;m>0;m/=10) if  ((m%10)!=2&&(m%10)!=3) {f=0;break;}
    if  (f) 
        {
        for (k=0,m=i,l=1;k<n;k++) 
            if  (!(m%2)) m/=2;
            else {l=0;break;}
        }
    if  (l) 
        {
        printf("%ld\n",i);
        break;
        }     
     }
if  (!l) printf("NO\n");
return 0;
}
                       
