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yukicoder contest 332 不参戦記

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yukicoder contest 332 不参戦記

A 1841 Long Long

Python だと乗算一発.

N = int(input())

print('Long' * N)

B 1842 Decimal Point

Aに10Cをかけて、Bで割った商を10で割ったあまりが答えだけど、10Cが大きすぎて計算できない. ここで10×BをBで割った商を10で割ったあまりが常に0になるという事実に気づくと計算可能になる.

T = int(input())

for _ in range(T):
    A, B, C = map(int, input().split())
    print((A * pow(10, C, B * 10)) // B % 10)
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