import java.util.Arrays;
import java.util.HashSet;
import java.util.LinkedList;
import java.util.Scanner;
import java.util.Set;

public class Main {
	
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		
		final int N = sc.nextInt();
		final int K = sc.nextInt();
		
		for(int i = N - 1; i >= 1; i--){
			if(N % i != 0){ continue; }
			
			System.out.println(i);
			break;
		}
		
	}
	
}