R, P, Q = map(int, input().split())
A, B, C, D = map(int, input().split())

A, B, C = sorted([A, B, C])

ans = 0

# 最初に作れるだけ作る
MIN = A
cnt = min(MIN, R//P)
ans += cnt
R -= cnt*P
A -= cnt
B -= cnt
C -= cnt
if A != 0:
    exit(print(ans))

# BかDが0になるまでDをAに変える
MIN = min(B, D)
cnt = min(MIN, R//(P+Q))
ans += cnt
R -= cnt*(P+Q)
B -= cnt
C -= cnt
D -= cnt

if 1 <= B and P+Q <= R:
    MIN = (B+C)//3
    cnt = min(MIN, R//(P+Q))
    ans += cnt
elif 1 <= D and P+Q+Q <= R:
    MIN = (C+D)//3
    cnt = min(MIN, R//(P+Q+Q))
    ans += cnt

print(ans)