一.题目要求二.参考代码

n=int(input())
s,a=0,[]
for i in range(n):
    m=int(input())
    for j in range(2,10):
        v=m*j
        for k in str(v):
            s=s+int(k)
        a.append(s)
        s=0
    a=set(a)
    a=list(a)
    if len(a)==1:
        print(a[0])
    else:
        print('NO')
    a=[]