题解 | #最大乘积#

import sys

def max_mat(a,n):
    global result2
    global index
    a.sort()
    for i in range(n):
        if a[i]>=0:
            index=i
            break
        else:
            pass

    if n>=3:
        result1= a[-1]*a[-2]*a[-3]
        if index>1:
            result2=a[0]*a[1]*a[-1]
        else: result2=result1-1
        if result1>result2: return result1
        else: return result2
    else: return None

for line in sys.stdin:
    a = list(map(int,line.split()))
    if len(a)>1:
        n=len(a)
        print(max_mat(a,n))