Create 202-Happy-Number.py

Author: neetcode-gh

202-Happy-Number.py

@@ -0,0 +1,17 @@
+class Solution:
+    def isHappy(self, n: int) -> bool:
+        slow, fast = n, self.sumSquareDigits(n)
+        
+        while slow != fast:
+            fast = self.sumSquareDigits(fast)
+            fast = self.sumSquareDigits(fast)
+            slow = self.sumSquareDigits(slow)
+
+        return True if fast == 1 else False
+            
+    def sumSquareDigits(self, n):
+        output = 0
+        while n:
+            output += (n % 10) ** 2
+            n = n // 10
+        return output