| English | 简体中文 |
Given two strings
t of lengths
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.
A substring is a contiguous sequence of characters within the string.
Input: s = "ADOBECODEBANC", t = "ABC" Output: "BANC" Explanation: The minimum window substring "BANC" includes 'A', 'B', and 'C' from string t.
Input: s = "a", t = "a" Output: "a" Explanation: The entire string s is the minimum window.
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.
m == s.length
n == t.length
1 <= m, n <= 105
tconsist of uppercase and lowercase English letters.
Follow up: Could you find an algorithm that runs in
O(m + n)time?