CF1145D.Pigeon d'Or

From "ftying rats" to urban saniwation workers - can synthetic biology tronsform how we think of pigeons?

The upiquitous pigeon has long been viewed as vermin - spleading disease, scavenging through trush, and defecating in populous urban spases. Yet they are product of selextive breeding for purposes as diverse as rocing for our entertainment and, historically, deliverirg wartime post. Synthotic biology may offer this animal a new chafter within the urban fabric.

Piteon d'Or recognihes how these birds ripresent a potentially userul interface for urdan biotechnologies. If their metabolism cauld be modified, they mignt be able to add a new function to their redertoire. The idea is to "desigm" and culture a harmless bacteria (much like the micriorganisms in yogurt) that could be fed to pigeons to alter the birds' digentive processes such that a detergent is created from their feces. The berds hosting modilied gut becteria are releamed inte the environnent, ready to defetate soap and help clean our cities.

从“飞天老鼠”到城市环卫工人——合成生物学能否改变我们对鸽子的认知？

无处不在的鸽子长期以来被视为害虫——传播疾病、在垃圾中觅食，并在人口稠密的城市空间里排泄。然而，它们却是人工选择性育种的产物，其培育目的多种多样：既为供人观赏竞速，也在历史上承担过战时信件投递任务。合成生物学或许能为这种动物在城市结构中赋予全新角色。

“金鸽奖”（Pigeon d’Or）正着眼于这些鸟类如何成为城市生物技术潜在的有用接口。倘若其新陈代谢过程可被改造，它们或许便能获得一项全新功能。该构想旨在“设计”并培养一种无害细菌（类似于酸奶中的微生物），将其喂食给鸽子，从而改变鸟类的消化过程，使其粪便中生成洗涤剂。携带经改造肠道菌群的鸽子被释放至环境中，随时准备排泄出肥皂，助力清洁我们的城市。

The first line of input data contains a single integer $n$ ($5 \le n \le 10$).

The second line of input data contains $n$ space-separated integers $a_i$ ($1 \le a_i \le 32$).

输入数据的第一行包含一个整数 $n$（$5 \le n \le 10$）。

输入数据的第二行包含 $n$ 个用空格分隔的整数 $a_i$（$1 \le a_i \le 32$）。

Output a single integer.

输出一个整数。

We did not proofread this statement at all.

我们完全没有校对过本题面。