#define  _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <algorithm>
#include <utility>
#include <functional>
#include <cstring>
#include <queue>
#include <stack>
#include <math.h>
#include <iterator>
#include <vector>
#include <string>
#include <set>
#include <math.h>
#include <iostream>
#include <map>
#include <iomanip>
#include <time.h>
#include <stdlib.h>
#include <list>
#include <typeinfo>
#include <list>
#include <set>
#include <cassert>
#include<fstream>
#include <cstdlib>
#include <unordered_map>
using namespace std;
#define Ma_PI 3.141592653589793
#define eps 0.00000001
#define LONG_INF 3000000000000000000
#define GOLD 1.61803398874989484820458
#define MAX_MOD 1000000007 
#define REP(i,n) for(long long i = 0;i < n;++i)
#define seg_size 524288
using namespace std;
vector<long long> geko = vector<long long>({ 2,460011,951143,1453467,1963817,2478478,2998839,3522473,4049561,4578583,5111443 });
int main() {
	long long cnt = 0;
	cin >> cnt;
	if (cnt % 100000 == 0) {
		cout << geko[cnt / 100000] << endl;
		return 0;
	}
	long long topper = cnt % 100000;
	for (int i = geko[cnt/100000]+1; i >= 0; ++i) {
		int now = i;
		long long nya = 1;
		for (int q = 2; q <= sqrt(now); ++q) {
			if (now % q == 0) {
				int cnt = 0;
				while (now % q == 0&&cnt <= 2) {
					cnt++;
					now /= q;
				}
				nya *= cnt + 1;
				if (nya >= 5) break;
			}
		}
		if (now != 1) {
			nya *= 2;
		}
		if (nya == 4) {
			topper--;
			if (topper == 0) {
				cout << i << endl;
				return 0;
			}
		}
	}
}