Submission #3087916

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Source Code Expand

#pr\
agma GCC optimize(2)
#include <cstdio>
#define min(a,b) ((a)<(b)?(a):(b))
#define ll long long
using namespace std;
ll a,b,c,d,n;
inline ll read()
{
    ll x=0,f=1;char ch=getchar();
    for (;ch<'0'||ch>'9';ch=getchar()) if (ch=='-') f=-1;
    for (;ch>='0'&&ch<='9';ch=getchar()) x=(x<<1)+(x<<3)+ch-'0';
    return x*f;
}
int main()
{
	a=read(),b=read(),c=read(),d=read(),n=read();
	c=min(c,min(a*4,b*2));
	printf("%lld\n",n&1?min(c*n,n/2*d+c):min(c*n,n/2*d));	
	return 0;
} 

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