Problem B. GCD
时间限制 3000 ms
内存限制 32 MB
Given 5 integers: a, b, c, d, k, you're to find x in a...b, y in c...d that GCD(x, y) = k. GCD(x, y) means the greatest common divisor of x and y. Since the number of choices may be very large, you're only required to output the total number of different number pairs.
Please notice that, (x=5, y=7) and (x=7, y=5) are considered to be the same.
Yoiu can assume that a = c = 1 in all test cases.
输入数据
输出数据
For each test case, print the number of choices. Use the format in the example.
样例输入
复制
2
1 3 1 5 1
1 11014 1 14409 9
样例输出
复制
Case 1: 9
Case 2: 736427
样例说明
For the first sample input, all the 9 pairs of numbers are (1, 1), (1, 2), (1, 3), (1, 4), (1, 5), (2, 3), (2, 5), (3, 4), (3, 5).
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