#include <iostream>
using namespace std;

int judge1(int a)
{
  int tmp = 10;
  while(a != 0) {
    if(tmp < a % 10) return 1;
    tmp = a % 10;
    a /= 10;
  }
  return 0;
}

int judge2(int a)
{
  int tmp = 0;
  while(a != 0) {
    if(tmp > a % 10) return 1;
    tmp = a % 10;
    a /= 10;
  }
  return 0;
}

int main()
{
  int nis = 0;
  int nnot = 100;
  int n = 100;
  while(nis != nnot * 99) {
    n += 1;
    if(judge1(n) * judge2(n) > 0) nis += 1;
    else nnot += 1;
  }
  cout << n << endl;
  return 0;
}