Update 56. 快乐数.md

Author: jasoncao11

56. 快乐数.md

@@ -4,10 +4,10 @@
 输入：n = 19
 输出：true
 解释：
-12 + 92 = 82
-82 + 22 = 68
-62 + 82 = 100
-12 + 02 + 02 = 1
+1**2 + 9**2 = 82
+8**2 + 2**2 = 68
+6**2 + 8**2 = 100
+1**2 + 0**2 + 0**2 = 1
 ```
 
 ```
@@ -25,4 +25,4 @@ def isHappy(self, n: int) -> bool:
         slow_runner = get_next(slow_runner)
         fast_runner = get_next(get_next(fast_runner))
     return fast_runner == 1
-```
+```