Codeforces Round #698 (Div. 2) D. Nezzar and Board
D. Nezzar and Board 题目连接： http://codeforces.com/contest/1478/problem/Dhtml Description Input Output 题意 给一个数列， a 1 a_1 a1, a 2 a_2 a2, a 3 a_3 a3… a n a_n an , 每一次操做定义为，从已有的数字中随意选一个数字做为x，再选一个数字做为y，
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相关文章
- 1. Codeforces Round #698 (Div. 2)
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