def ext_gcd(a,b):
    if b==0:
        return a,1,0
    d,x,y = ext_gcd(b,a%b)
    return d,y,x-(a//b)*y
N = int(input())
P,Q,R = map(int,input().split())
A,B,C = map(int,input().split())
_,x1,y1 = ext_gcd(P*Q,R)
x = x1*C*P*Q
_,x2,y2 = ext_gcd(Q*R,P)
x += x2*A*Q*R
_,x3,y3 = ext_gcd(R*P,Q)
x += x3*B*R*P
if 0<=x<P*Q*R:
    if x>N:
        k = -1
    else:
        k = (N-x)//(P*Q*R)
elif x<0:
    k1 = ((P*Q*R)-1-x)//(P*Q*R)
    x += k1*P*Q*R
    if x>N:
        k = -1
    else:
        k = (N-x)//(P*Q*R)
else:
    k1 = ((x-P*Q*R)+P*Q*R-1)//(P*Q*R)
    x -= k1*P*Q*R
    if x>N:
        k = -1
    else:
        k = (N-x)//(P*Q*R)
print(k+1)