import sys
input = lambda :sys.stdin.readline()[:-1]
ni = lambda :int(input())
na = lambda :list(map(int,input().split()))
yes = lambda :print("yes");Yes = lambda :print("Yes");YES = lambda : print("YES")
no = lambda :print("no");No = lambda :print("No");NO = lambda : print("NO")
#######################################################################
n = ni()
a,b,c = na()
ans = 0
d = max(c * 3, b * 6, a * 10)

for i in range(100):
    for j in range(100):
        for k in range(100):
            l = (n - i * 3 - j * 5 - k * 10)//30
            if l < 0:
                continue
            ans = max(ans, i * a + j * b + k * c + l * d)

print(ans)