靶子 - Problème

#6749. 靶子

Statistiques

AI Translation — This statement was translated using AI and may contain inaccuracies. Please refer to the original statement if in doubt.

现在你拥有 $s = 0.5$ 和一个实数 $0 \le a \le 1$。你可以选择以下两种操作之一： 1. $a = as$ 2. $a = (a - 1)s + 1$

现在你需要通过最多 50 次操作，使 $a$ 等于目标数字 $b$。若两个数 $x, y$ 满足 $|x - y| \le 10^{-4}$，则认为它们相等。可以证明答案一定存在。

输入格式

第一行包含两个实数 $a, b$。

输出格式

输出一个由 '1' 和 '2' 组成的字符串，表示你的操作序列。

样例

样例输入 1

0.5 0.25

样例输出 1

样例输入 2

1 0.75

样例输出 2

样例输入 3

1 0

样例输出 3

1111111111111111111111

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