# 0246. Strobogrammatic Number

https://leetcode.com/problems/strobogrammatic-number

## Description

Given a string `num` which represents an integer, return `true` _if_ `num` _is a **strobogrammatic number**_.

A **strobogrammatic number** is a number that looks the same when rotated `180` degrees (looked at upside down).

**Example 1:**

```
**Input:** num = "69"
**Output:** true
```

**Example 2:**

```
**Input:** num = "88"
**Output:** true
```

**Example 3:**

```
**Input:** num = "962"
**Output:** false
```

**Example 4:**

```
**Input:** num = "1"
**Output:** true
```

**Constraints:**

* `1 <= num.length <= 50`
* `num` consists of only digits.
* `num` does not contain any leading zeros except for zero itself.

## ac

```java
```
