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2465:Binary Integer

题目描述
An antique machine with C(n , 3) switches capable of processing integers in the range 0...2N-1 has just been discovered. Each switch is associated to a distinct integer in 0...2N-1 with exactly three ones in its binary representation. By setting switches associated with number X0,X1...XM-1 to on, any integer Y passing through the machine will render a result of Y⊕X0⊕X1⊕...⊕XM-1(here “⊕” stands for bitwise-XOR).
We are interested in the number of configurations capable of transforming integer S into T with exactly K switches set to on. Could you write a program to help us?
输入解释
There are multiple test cases in the input file.
Each test case starts with two integers, N and K (1 ≤ N ≤ 40 , 0 ≤ K ≤ min{20 , C(N,3)} ), followed by two binary integers, S and T, each containing exactly N bits.
Two successive test cases are separated by a blank line. A case with N = 0 and K = 0 indicates the end of the input file, and should not be processed by your program.
输出解释
For each test case, please print a single integer, the total number of ways to
transform the first integer into the second one. Since the answer could be quite large,
you are only required to find the result % 10007.
输入样例
4 3
1101
1001
3 1
101
010
5 3
11010
10111
0 0
输出样例
Case #1: 1
Case #2: 1
Case #3: 6
来自杭电HDUOJ的附加信息
Recommend lcy

该题目是Virtual Judge题目,来自 杭电HDUOJ

源链接: HDU-2465

最后修改于 2020-10-25T22:53:41+00:00 由爬虫自动更新

共提交 0

通过率 --%
时间上限 内存上限
3000/1000MS(Java/Others) 32768/32768K(Java/Others)