Score : $200$ points

问题陈述

326类数字是指一个三位正整数，其中百位数与十位数的乘积等于个位数。

例如，$326, 400, 144$ 是326类数字，而 $623, 777, 429$ 不是。

给定一个整数 $N$，找出大于或等于 $N$ 的最小的326类数字。在给定的约束条件下，该数字总是存在的。

以上为通义千问 qwen-max 翻译，仅供参考。

Problem Statement

A 326-like number is a three-digit positive integer where the product of the hundreds and tens digits equals the ones digit.

For example, $326,400,144$ are 326-like numbers, while $623,777,429$ are not.

Given an integer $N$, find the smallest 326-like number greater than or equal to $N$. It always exists under the constraints.

Constraints

• $100 \leq N \leq 919$
• $N$ is an integer.

Input

The input is given from Standard Input in the following format:

$N$

Output

Print the answer.

Sample Input 1

320

Sample Output 1

326

$320,321,322,323,324,325$ are not 326-like numbers, while $326$ is a 326-like number.

Sample Input 2

144

Sample Output 2

144

$144$ is a 326-like number.

Sample Input 3

516

Sample Output 3

600

update @ 2024/3/10 01:49:03