# 16.11.2025
[1513. Number of Substrings With Only 1s](https://leetcode.com/problems/number-of-substrings-with-only-1s/description/) medium
Substrings of ones #medium #counting
[1513. Number of Substrings With Only 1s](https://leetcode.com/problems/number-of-substrings-with-only-1s/description/) medium
Substrings of ones #medium #counting
👍1