Update LeetCode第231号问题：2的幂.md

95aeea99 · Zongbao Feng · GitHub · fdee9bf6 · 95aeea99
Unverified Commit 95aeea99 authored May 21, 2019 by Zongbao Feng Committed by GitHub May 21, 2019
--- a/notes/LeetCode第231号问题：2的幂.md
+++ b/notes/LeetCode第231号问题：2的幂.md
@@ -15,7 +15,7 @@
 ```
 输入: 1
 输出: true
-解释: 20 = 1
+解释: 2^0 = 1
 ```
 **示例 2:**
@@ -23,7 +23,7 @@
 ```
 输入: 16
 输出: true
-解释: 24 = 16
+解释: 2^4 = 16
 ```
 **示例 3:**