I,R,P=input,range,print
def J():
	return map(int,I().split())
N=int(I())
A,B,C=J()
d=0
for c in R(N//10+1):
	n=N-c*10
	for b in R(min(3,n//5+1)):
		m=n-b*5
		d=max(d,c*C+b*B+(m//3)*A)
	for a in R(min(5,n//3+1)):
		m=n-a*3
		d=max(d,c*C+(m//5)*B+a*A)
P(d)