python 取整itertools

#coding:utf-8
import sys
import itertools

def MaxString(n,nums):

    list1 = nums
    list2 = []
    for i in range(1, len(list1) + 1):
        iter = itertools.combinations(list1, i)
        m=list(iter)
        k=len(m)
        for j in range(k):
            if sum(m[j])%n==0:
                list2.append(m[j])
    print(list2)
    k=len(list2[len(list2)-1])
    if k!=0:
        print(k)
    else:
        print(0)
if __name__=='__main__':
    a=int(input())
    b=[int(i) for i in sys.stdin.readline().split(' ')]
    MaxString(a,b)