티스토리 뷰

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t = int(input())
for i in range(t):
    n = int(input())
    d = {}
    for j in range(n):
        wear, type = input().split()
        l = d.get(type, [])
        d[type] = [*l, wear]

    ans = 1
    for k,v in d.items():
        ans *= (len(v)+1)

    ans-=1
    print(ans)
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