2018

题号：NC52901
时间限制：C/C++/Rust/Pascal 1秒，其他语言2秒
空间限制：C/C++/Rust/Pascal 32 M，其他语言64 M
Special Judge, 64bit IO Format: %lld

题目描述

Given a, b, c, d, find out the number of pairs of integers (x, y) where $a \leq x \leq b, c \leq y \leq d$ and $x \cdot y$ is a multiple of 2018.

The input consists of several test cases and is terminated by end-of-file.
Each test case contains four integers a, b, c, d.

For each test case, print an integer which denotes the result.

示例1

复制

1 2 1 2018
1 2018 1 2018
1 1000000000 1 1000000000

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3
6051
1485883320325200

* 
* The number of tests cases does not exceed .