import sys
input = sys.stdin.readline

N = int(input())
A, B, C = map(int, input().split())
a = max(10*A, 6*B, 3*C)
D = 0
for x in range(11):
    for y in range(7):
        for z in range(4):
            n = 3*x+5*y+10*z
            if n > N:
                continue
            rem = (N-n)//30*a
            D = max(D, A*x+B*y+C*z+rem)
print(D)