#include<stdio.h>
int main()
{
	int n;
	int i;
	scanf("%d",&n);
	if(n%2==0)
	printf("%d",n/2);
	for(i=3;i<=n;i+1)
	{
		if(n%i==0)
			printf("%d",n/i);
		break;
	}
	getchar();
	getchar();
	return 0;
}