K5kC | Code & More

Computer Science

Algorithms Programming Languages Database System Design

Blind 75 Difficulty: Easy Difficulty: Medium Difficulty: Hard

Android Data Science Computer Vision Simulations

UUID Generator Code Formatter

Number of Ways to Select Buildings

medium Solve on LeetCode

Problem
Examples
Example 1
Example 2
Constraints
Solution
Method 1 – Prefix Sums and Combinatorics
Intuition
Approach
Code
Complexity

Related Tags

dynamic-programming leetcode prefix-sum string

Privacy Disclaimer Report an Issue About

© 2026 K5kC | Code & More. All rights reserved.

चरैवेति चरैवेति | Keep moving on

Number of Ways to Select Buildings - Coding Problem | K5kC