auto commit

notes/剑指 offer 题解.md

@@ -1410,7 +1410,7 @@ public int NumberOf1Between1AndN_Solution(int n) {
 
 ```java
 int digitAtIndex(int index) {
-    if (index >= 0) {
+    if (index < 0) return -1;
     int digit = 1;
     while (true) {
         int amount = getAmountOfDigit(digit);
@@ -1419,8 +1419,6 @@ int digitAtIndex(int index) {
         index -= totalAmount;
         digit++;
     }
-    }
-    return -1;
 }
 
 private int getAmountOfDigit(int digit) {
@@ -1438,6 +1436,11 @@ private int beginNumber(int digits) {
     if (digits == 1) return 0;
     return (int) Math.pow(10, digits - 1);
 }
+
+public static void main(String[] args) {
+    Solution solution = new Solution();
+    System.out.println(solution.digitAtIndex(1001));
+}
 ```
 
 ## 45. 把数组排成最小的数