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AtCoder B - Count Balls

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問題


n, a, b = map(int, input().split())
ans = 0

ans = n // (a + b) * a  #商でn内にある青の数

rem = n % (a + b) #あまりで青の数。あまりはかなら

ans += min(rem, a) #余ったボールの数と青いボールの数の小さい方を足す。余ったボールは青いボールから始まる。

print(ans)

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