2547. 사탕 선생 고창영

import sys
input = sys.stdin.readline
t = int(input())
for _ in range(t):
    i = input()
    n = int(input())
    ans = 0
    for _ in range(n):
        ans += int(input())%n
    if ans%n == 0:
        print('YES')
    else:
        print('NO')