import sys
input = sys.stdin.readline

N=int(input())
B=int(input())
C=list(map(int,input().split()))
S=list(map(int,input().split()))

A=[]
for i in range(N):
    A.append((C[i],S[i]))

A.sort()

MAX=[0]*N

MAX[-1]=A[-1][1]

for i in range(N-2,-1,-1):
    MAX[i]=max(MAX[i+1],A[i][1])

MAX.append(0)

ANS=0
now=B
score=0

for i in range(N):
    nec=MAX[i+1]

    c,s=A[i]

    if now-c*s>=nec:
        now-=c*s
        score+=s

        ANS=max(ANS,score+nec)
    else:
        k=(now-nec)//c

        for j in range(k-3,k+4):
            if j>=1 and j<=s and now-j*c>=1:
                score2=score+j
                now2=now-j*c

                ANS=max(ANS,score2+min(nec,now2))

        k=min(s,now//c)

        now-=c*k
        score+=k

print(ANS)