Migrated from Lutece 3264 有序对

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Description

求有序对 $(a,b)$ 的个数，满足：

1. $\lfloor \frac{a}{b} \rfloor = a\bmod b$
2. $1\leq a\leq p$ 且 $1\leq b \leq q$

Input

一行，两个正整数 $p$ 和 $q$。

Output

一行，一个整数，表示答案。

Samples

19 84

25

Constraints

$1\leq p,q\leq 10^9$

Resources

2024 UESTC ICPC Training for Math