#include<cstdio>
#define min(a,b) a<b?a:b
using namespace std;
int k,n,s[101],hb[100010],sum[101],i,j;
int lyh()
{
	freopen("humble.in","r",stdin);
	freopen("humble.out","w",stdout);
	hb[0]=1;
	scanf("%d%d",&k,&n);
	for(i=1;i<=k;i++)scanf("%d",&s[i]);
	for(j=1;j<=n;j++)
	{
		int minn=0x7fffffff;
		for(i=1;i<=k;i++)minn=min(minn,hb[sum[i]]*s[i]);
		hb[j]=minn;
		for(i=1;i<=k;i++)while(hb[sum[i]]*s[i]<=hb[j])sum[i]++;
	}
	printf("%d\n",hb[n]);
	return 0;
}
int Main=lyh();
int main(){;}