package No1058;

import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.Collections;
import java.util.NoSuchElementException;

public class Main {
	
	static FastScanner in = new FastScanner(System.in);
	static PrintWriter out = new PrintWriter(System.out);

	public static void main(String[] args) {		
		int N = in.nextInt();
		ArrayList<Long> sutekiList = sutekiList(primeList());
		out.println(sutekiList.get(N-1));
		out.close();
	}

	static long[] primeList() {
		int number = 100001;
		int count = 0;
		long[] result = new long[10];
		while(true) {
			if(isPrime(number)) {
				result[count] = number;
				count++;
				if(count >= 10) break;
			}
			number++;
		}
		return result;
	}
	
	static ArrayList<Long> sutekiList(long[] primeList) {
		ArrayList<Long> result = new ArrayList<>();
		result.add(1L);
		for(int i=0; i<primeList.length; i++) {
			for(int j=i; j<primeList.length; j++) {
				result.add(primeList[i] * primeList[j]);
			}
		}
		Collections.sort(result);
		return result;
	}
	
	static boolean isPrime(int n) {
		if(n == 1) return false;
		for(int i=2; i<n; i++) {
			if(n % i == 0) return false;
		}
		return true;
	}

	static class FastScanner {
		private InputStream in = null;
		private final byte[] buffer = new byte[1024];
		private int ptr = 0;
		private int buflen = 0;

		FastScanner(InputStream inStream) {
			in = inStream;
		}

		private boolean hasNextByte() {
			if (ptr < buflen) {
				return true;
			} else {
				ptr = 0;
				try {
					buflen = in.read(buffer);
				} catch (IOException e) {
					e.printStackTrace();
				}
				if (buflen <= 0) {
					return false;
				}
			}
			return true;
		}

		private int readByte() {
			if (hasNextByte())
				return buffer[ptr++];
			else
				return -1;
		}

		private static boolean isPrintableChar(int c) {
			return 33 <= c && c <= 126;
		}

		public boolean hasNext() {
			while (hasNextByte() && !isPrintableChar(buffer[ptr]))
				ptr++;
			return hasNextByte();
		}

		public String next() {
			if (!hasNext())
				throw new NoSuchElementException();
			StringBuilder sb = new StringBuilder();
			int b = readByte();
			while (isPrintableChar(b)) {
				sb.appendCodePoint(b);
				b = readByte();
			}
			return sb.toString();
		}

		public long nextLong() {
			if (!hasNext())
				throw new NoSuchElementException();
			long n = 0;
			boolean minus = false;
			int b = readByte();
			if (b == '-') {
				minus = true;
				b = readByte();
			}
			if (b < '0' || '9' < b) {
				throw new NumberFormatException();
			}
			while (true) {
				if ('0' <= b && b <= '9') {
					n *= 10;
					n += b - '0';
				} else if (b == -1 || !isPrintableChar(b)) {
					return minus ? -n : n;
				} else {
					throw new NumberFormatException();
				}
				b = readByte();
			}
		}

		public int nextInt() {
			long nl = nextLong();
			if (nl < Integer.MIN_VALUE || nl > Integer.MAX_VALUE)
				throw new NumberFormatException();
			return (int) nl;
		}

		public double nextDouble() {
			return Double.parseDouble(next());
		}
	}
}