90% of People Misread This Problem | LeetCode 788 #leetcode #coding #codinginterviews #dsa

At first glance, LeetCode 788 – Rotated Digits looks incredibly easy.

But there’s a hidden logic trap:
👉 a number being VALID does NOT mean it’s GOOD.

Most people:

only check if digits remain valid
completely forget the number must also CHANGE

That tiny distinction changes the entire problem.

In this short, you’ll learn:
✅ the 3-digit classification trick
✅ how to instantly reject invalid numbers
✅ why “changed vs unchanged” matters
✅ the clean digit simulation approach

This is a perfect interview problem for:

edge case thinking
careful condition checking
digit manipulation patterns

Видео 90% of People Misread This Problem | LeetCode 788 #leetcode #coding #codinginterviews #dsa канала Leetcode Lab