#include <iostream>
using namespace std;
int main() {
int n;
cin >> n;
int l = 0;
for(int i = 1; n > 0; i++)
{
int sum = 0, mult = 1;
int c = i;
while(c > 0)
{
sum += c % 10;
mult *= (c % 10);
c /= 10;
}
if(sum == mult) n--;
l = i;
}
cout << l;
return 0;
}
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