Grammy 有個獨特嘅見解關於字串。佢覺得一個字串係 正數 若且唯若佢字典序大過佢嘅反轉。
家下俾咗你一個字串，請你計出有幾多個連續子字串係符合 Grammy 嘅見解嘅正數。
輸入
唯一一行包含一個字串 $S$（$1 \leq |S| \leq 200\,000$），由細楷英文字母組成。
輸出
輸出一個整數，表示 $S$ 入面正數子字串嘅數量。
示例
輸入 1
jjikkollp
輸出 1
4
輸入 2
pbpbppb
輸出 2
7
QOJ.ac
QOJ
時間限制： 2 s
記憶體限制： 1024 MB
總分： 100
#4844. Positive String
统计Discussions
About Discussions
The discussion section is only for posting: General Discussions (problem-solving strategies, alternative approaches), and Off-topic conversations.
This is NOT for reporting issues! If you want to report bugs or errors, please use the Issues section below.
Open Discussions 0
No discussions in this category.
Issues
About Issues
If you find any issues with the problem (statement, scoring, time/memory limits, test cases, etc.), you may submit an issue here. A problem moderator will review your issue.
Guidelines:
- This is not a place to publish discussions, editorials, or requests to debug your code. Issues are only visible to you and problem moderators.
- Do not submit duplicated issues.
- Issues must be filed in English or Chinese only.
Active Issues 0
No issues in this category.
Closed/Resolved Issues 0
No issues in this category.