A strobogrammatic number is a number that looks the same when rotated 180 degrees (looked at upside down).
Write a function to determine if a number is strobogrammatic. The number is represented as a string.
Example 1:
Input: "69" Output: true
Example 2:
Input: "88" Output: true
Example 3:
Input: "962" Output: false
[Hash Table] [Two Pointers] [String]
- Strobogrammatic Number II (Medium)
- Strobogrammatic Number III (Hard)
- Confusing Number (Easy)