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http://www.lydsy.com/JudgeOnline/problem.php?id=2419 ∑Ui−UjRi,j=0∑Ui−UjRi,j=0 ∑U1−UjR1,j=1∑U1−UjR1,j=1 ∑Un−UjRi,n=−1∑Un−UjRi,n=−1 Un=0 这就是方程了。。。但是代码有点 阅读全文
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In an extended version of the game Lights Out®, is a puzzle with 5 rows of 6 buttons each (the actual puzzle has 5 rows of 5 buttons each). Each butto 阅读全文
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Consider an n-by-n matrix A. We define Ak = A ∗ A ∗ . . . ∗ A (k times). Here, ∗ denotes the usual matrix multiplication. You are to write a program t 阅读全文
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Given the value of a+b and ab you will have to find the value of a n + b n Input The input file contains several lines of inputs. Each line except the 阅读全文