摘要：
Duha decided to have a trip to Singapore by plane.The airplane had nn seats numbered from 11 to nn, and nn... 阅读全文
摘要：
It is my great honour to introduce myself to you here. My name is Aloysius Benjy Cobweb Dartagnan Egbert F... 阅读全文
摘要：
Firdaws and Fatinah are living in a country with nn cities, numbered from 11 to nn. Each city has a risk o... 阅读全文
摘要：
You're given a permutation aa of length nn (1 \le n \le 10^51≤n≤105).For each i \in [1,n]i∈[1,n], construc... 阅读全文
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As the current heir of a wizarding family with a long history,unfortunately, you find yourself forced to p... 阅读全文