import sys
input = sys.stdin.readline

N = int(input())
A, B, C = map(int, input().split())
a = max(10*A, 6*B, 3*C)
base = N//30*a
N %= 30
D = 0
for x in range(N+1):
    for y in range(N+1):
        for z in range(N+1):
            if 3*x+5*y+10*z <= N:
                D = max(D, A*x+B*y+C*z)
D += base
print(D)