1524: 2019
内存限制：128 MB
时间限制：1.000 S
评测方式：文本比较
命题人：
提交：22
解决：4
题目描述
Given a, b, c, d, find out the number of pairs of integers (x, y) where a≤x≤b,c≤y≤d and x⋅y is a multiple of 2019.
* 1<=a<=b<=109 ,1<=c<=d<=109 .
* The number of tests cases does not exceed 104
* 1<=a<=b<=109 ,1<=c<=d<=109 .
* The number of tests cases does not exceed 104
输入
The input consists of several test cases and is terminated by end-of-file.
Each test case contains four integers a, b, c, d.
Each test case contains four integers a, b, c, d.
输出
For each test case, print an integer which denotes the result.
样例输入 复制
1 2 1 2019
样例输出 复制
2