GFG POTD 🔥 Smallest Window Containing All Characters | Hard Sliding Window Problem | DSA Interview
Автор: Gopo workspace
Загружено: 2026-03-05
Просмотров: 50
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🔥 GeeksforGeeks Problem of the Day (GFG POTD)
In this video, we solve the Hard DSA problem:
"Smallest Window Containing All Characters".
Given two strings s and p, the task is to find the smallest substring in s that contains all characters of string p (including duplicates). If multiple answers exist, we return the one with the smallest starting index.
This is a classic Sliding Window + Hash Map problem that is very important for coding interviews at top companies like Amazon, Microsoft, Google, and Flipkart.
💡 In this video you will learn:
• Optimal Sliding Window Approach
• HashMap Frequency Technique
• Step-by-step Dry Run
• Interview Optimization Trick
• Time & Space Complexity
📌 Problem Example:
Input: s = "timetopractice", p = "toc"
Output: "toprac"
Input: s = "zoomlazapzo", p = "oza"
Output: "apzo"
⏱ Time Complexity: O(N)
💾 Space Complexity: O(1)
This problem is very similar to the famous "Minimum Window Substring" interview question.
If you are preparing for:
DSA Interviews
Coding Interviews
FAANG Preparation
GeeksforGeeks POTD
then this problem is very important for you.
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#GFGPOTD #SlidingWindow #DSA #CodingInterview #GeeksforGeeks
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