Day 2 April Challenge done

202/main.py

+class Solution:
+
+    def __init__(self):
+        self.memo = dict()
+
+    def isHappy(self, n):
+        return self.recIsHappy(n)
+
+    def recIsHappy(self, n):
+        if n in self.memo:
+            return False
+        elif n == 1:
+            return True
+        else:
+            self.memo[n] = True
+            newN = 0
+            for c in str(n):
+                newN += int(c) ** 2
+            return self.recIsHappy(newN)
+
+s = Solution()
+print("Expected: True")
+print("Got:", s.isHappy(19))

202/problem.txt

+Write an algorithm to determine if a number is "happy".
+
+A happy number is a number defined by the following process: Starting with any positive integer, replace the number by the sum of the squares of its digits, and repeat the process until the number equals 1 (where it will stay), or it loops endlessly in a cycle which does not include 1. Those numbers for which this process ends in 1 are happy numbers.
+
+Example: 
+
+Input: 19
+Output: true
+Explanation: 
+12 + 92 = 82
+82 + 22 = 68
+62 + 82 = 100
+12 + 02 + 02 = 1

202/run.sh

+#!/bin/bash
+
+python3 main.py