Files
cpp-flashcards/org/study_deck_02/dsa/sliding-window/0076-minimum-window-substring.org
T
tomatocream 1dec88aaf2 feat: populate note files with problem descriptions and code stubs
Add populate-notes.mjs that fetches problem descriptions and
Python/C++ code stubs from LeetCode's GraphQL API. Populated
all 197 NeetCode 150 note files with:
- Problem description (examples, constraints)
- Python code stub (function signature)
- C++ code stub (function signature + includes)

API responses cached in leetcode/.cache/leetcode/ for instant re-runs.
2026-06-01 17:22:07 +08:00

1.6 KiB

TODO 0076. Minimum Window Substring   hard

Given two strings s and t of lengths m and n respectively, return the minimum window substring/* of s such that every character in t (*including duplicates) is included in the window/. If there is no such substring, return /the empty string /~""~.

The testcases will be generated such that the answer is unique.

Example 1:

Input: s = "ADOBECODEBANC", t = "ABC"
Output: "BANC"
Explanation: The minimum window substring "BANC" includes 'A', 'B', and 'C' from string t.

Example 2:

Input: s = "a", t = "a"
Output: "a"
Explanation: The entire string s is the minimum window.

Example 3:

Input: s = "a", t = "aa"
Output: ""
Explanation: Both 'a's from t must be included in the window.
Since the largest window of s only has one 'a', return empty string.

Constraints:

  • m == s.length
  • n == t.length
  • 1 <= m, n <= 10^{5}
  • s and t consist of uppercase and lowercase English letters.

Follow up: Could you find an algorithm that runs in O(m + n) time?

TODO Approach

Write your approach here.

TODO Python

class Solution:
    def minWindow(self, s: str, t: str) -> str:

TODO C++

class Solution {
public:
    string minWindow(string s, string t) {
        
    }
};