> #include"iostream"
> using namespace std;
> int main()
> {
> __int64 a[10000]={1},p1,p2,p3,this1,this2,this3;//这里类型符少了下划线"_" ；已经改过来了
> int pp1,pp2,pp3;
> int n;
> scanf("%I64d %I64d %I64d %I64d",&p1,&p2,&p3,&n);
> //printf("%I64d %I64d %I64d %d",p1,p2,p3,n);
> pp1=pp2=pp3=0;
> for(int i=1;i<=n;i++)
> {
> 	this1=a[pp1]*p1;
> 	this2=a[pp2]*p2;
> 	this3=a[pp3]*p3;
> 	_int64 min=((this1<=this2?this1:this2)<=this3)?(this1<=this2?this1:this2):this3;
> 	a[i]=min;
> 	if(this1==min) pp1++;
>     if(this2==min) pp2++;
> 	if(this3==min) pp3++;
> //printf("%I64d\n",a[i]);
> }
> printf("%I64d\n",a[n]);
> return 0;
> }