Merge pull request youngyangyang04#2503 from jycoast/master

Update 0017.电话号码的字母组合.md
andyliao5555 · May 1, 2024 · b23f1a9 · b23f1a9
2 parents b07e850 + 96e9fcb
commit b23f1a9
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/problems/0017.电话号码的字母组合.md b/problems/0017.电话号码的字母组合.md
@@ -260,7 +260,7 @@ class Solution {
 
     }
 
-    //每次迭代获取一个字符串，所以会设计大量的字符串拼接，所以这里选择更为高效的 StringBuilder
+    //每次迭代获取一个字符串，所以会涉及大量的字符串拼接，所以这里选择更为高效的 StringBuilder
     StringBuilder temp = new StringBuilder();
 
     //比如digits如果为"23",num 为0，则str表示2对应的 abc
@@ -274,7 +274,7 @@ class Solution {
         String str = numString[digits.charAt(num) - '0'];
         for (int i = 0; i < str.length(); i++) {
             temp.append(str.charAt(i));
-            //c
+            //递归，处理下一层
             backTracking(digits, numString, num + 1);
             //剔除末尾的继续尝试
             temp.deleteCharAt(temp.length() - 1);