Leetcode Problem 202. Happy Number

202. Happy Number

Leetcode Solutions

Detect Cycles with a HashSet

  1. Initialize an empty HashSet to store the intermediate numbers.
  2. Use a loop to apply the happy number process to the current number.
  3. If the current number is 1, return true.
  4. If the HashSet already contains the current number, a cycle is detected, return false.
  5. Otherwise, add the current number to the HashSet and continue the process.
  6. Repeat steps 2-5 until a result is obtained.
UML Thumbnail

Floyd's Cycle-Finding Algorithm

Ask Question

Programming Language
image/screenshot of info(optional)
Full Screen
Loading...

Suggested Answer

Answer
Full Screen
Copy Answer Code
Loading...