Problem
Ask
Submissions

Problem: Count Substrings with Only One Distinct Letter

Medium
30 min
Explore how to identify and count substrings composed of a single distinct letter in a string. This lesson helps you understand the problem constraints and apply efficient techniques in math and string manipulation to solve substring counting challenges.

Statement

Given a string s, return the total number of substrings that contain only one distinct letter.

Constraints:

  • 11 \leq s.length 1000\leq 1000

  • s[i] consists of only lowercase English letters.

Problem
Ask
Submissions

Problem: Count Substrings with Only One Distinct Letter

Medium
30 min
Explore how to identify and count substrings composed of a single distinct letter in a string. This lesson helps you understand the problem constraints and apply efficient techniques in math and string manipulation to solve substring counting challenges.

Statement

Given a string s, return the total number of substrings that contain only one distinct letter.

Constraints:

  • 11 \leq s.length 1000\leq 1000

  • s[i] consists of only lowercase English letters.