LeetCode 1498 | Number of Subsequences That Satisfy the Given Sum Condition | Python | AlgoYogi

Welcome to **AlgoYogi**! In this video, we solve **LeetCode problem 1498: Number of Subsequences That Satisfy the Given Sum Condition** step-by-step using Python. This is a beautiful problem combining **two-pointer technique, sorting, and combinatorics (powers of two)** — a favorite in coding interviews for testing algorithmic thinking. 👉 **LeetCode Problem Link:** [Number of Subsequences That Satisfy the Given Sum Condition - LeetCode 1498](https://leetcode.com/problems/number-of-subsequences-that-satisfy-the-given-sum-condition/) --- ### 🚀 Timestamps 0:00 Introduction 0:20 Problem Explanation and Constraints 1:10 Sorting + Two-Pointer Strategy & Intuition 10:30 Python Implementation 14:20 Time and Space Complexity --- ### 💡 Why Watch? - Learn how to **count valid subsequences efficiently** using sorting and two pointers - Understand why **2^(right - left) represents the number of valid subsequences** - Practice solving **subsequence counting problems without generating all subsequences** --- ### 📢 Next Steps - Try solving this problem on LeetCode after watching - Explore similar problems like: - **Two Sum II** - **3Sum** - **Subsets** - Comment below what other **counting or subsequence problems** you want next! 👍 Like, 💬 Comment, and 🔔 Subscribe to **AlgoYogi** for clean Python LeetCode tutorials and structured coding prep. #LeetCode #PythonSolutions #Subsequences #TwoPointers #AlgoYogi #CodingInterview