python 15行

def main():
    N = int(input())
    nums = [int(i) for i in input().split()]
    s = set(nums)
    d = {i:nums.count(i) for i in s}
    m = min(d.values())
    if m<2:
        return 0
    res = 0
    for k in d:
        cnt = d[k]//m
        if d[k]%m!=0:
            return 0
        res += cnt
    return res