摘要：
题目 For their physical fitness program, $N (2 ≤ N ≤ 1,000,000)$ cows have decided to run a relay race using the $T (2 ≤ T ≤ 100)$ cow trails throughout 阅读全文
摘要：
The only difference between the easy and the hard versions is the maximum value of $k$. You are given an infinite sequence of form "112123123412345…" 阅读全文