这是一个简单的任务。甚至更简单。我们喜欢生成不同的数字，我们认为你也会喜欢它。给定一个整数 $s$，请尝试生成一个数字，使其各位数字之和等于 $s$，且不包含数字 $0$，同时任意相邻的数字都不相等，并使该数字最大。
输入包含一行，为一个整数 $s$。
$$1 \le s \le 42$$
输出一个满足题目要求的最大数字。
样例
输入格式 1
1
输出格式 1
1
输入格式 2
2
输出格式 2
2
QOJ.ac
QOJ
Time Limit: 1 s
Memory Limit: 64 MB
Total points: 100
#811. 数字构造器
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