Codeforces 148A

#include <stdio.h>
#include <string.h>

int main()
{
	int a[5];
	int total;
	memset(a, 0, sizeof(a));
	int i;
	for(i=1; i<=4; ++i)
	{
		scanf("%d", &a[i]);
	}
	scanf("%d", &total);
	int j;
	int Count=0;
	for(i=1; i<=total; ++i)
	{
		for(j=1; j<=4; ++j)
		{
			if(i%a[j]==0)
			{
				++Count;
				break;
			}
		}
	}
	printf("%d\n", Count);
	return 0;
}