uva787

uva787.py

import sys
readints=lambda:map(int, input().strip('\n').split())


# use python due to biginteger issues

def maxprod(arr):
    maxarr=arr[0]
    minarr=arr[0]
    haszero = arr[0]==0
    ans = arr[0]
    for i in range(1,len(arr)):
        ans=max(ans,arr[i])
        if arr[i]==0:
            haszero=True
            continue
        if arr[i-1]==0:
            maxarr=minarr=arr[i]
            continue

        maxarr2 = max(maxarr*arr[i],minarr*arr[i],arr[i])
        minarr2 = min(maxarr*arr[i],minarr*arr[i],arr[i])
        maxarr,minarr = maxarr2,minarr2
        ans = max(ans, maxarr)


    if haszero: return max(0, ans)
    return ans
            
while True:
    try:
        line = list(readints())
    except EOFError:
        sys.exit(0)

    ans = maxprod(line[:-1])
    print(ans)