Efficient C++ Solution to Count Binary Substrings Meeting K-Constraint 🔍

Learn how to **count the number of substrings** in a binary string that satisfy a k-constraint. A substring satisfies the k-constraint if the number of 0's or 1's is at most **k**. This tutorial includes **C++ implementation, input-output examples, and step-by-step logic** for all queries. **Example 1:** ``` Input: s = "0001111", k = 2, queries = [[0,6]] Output: [26] ``` **Example 2:** ``` Input: s = "010101", k = 1, queries = [[0,5],[1,4],[2,3]] Output: [15,9,3] ``` **Key Concepts Covered:** * Binary strings processing * Substring counting logic * Prefix sums or sliding window optimization * Handling multiple queries efficiently * C++ implementation #CPlusPlus #BinaryString #SubstringCount #KConstraint #CodingChallenge #DSA #LeetCodeSolution #CompetitiveProgramming #CodingTheoryGuru #CPlusPlusTutorial