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title Sliding Window
type docs

Sliding Window

  • 双指针滑动窗口的经典写法。右指针不断往右移，移动到不能往右移动为止(具体条件根据题目而定)。当右指针到最右边以后，开始挪动左指针，释放窗口左边界。第 3 题，第 76 题，第 209 题，第 424 题，第 438 题，第 567 题，第 713 题，第 763 题，第 845 题，第 881 题，第 904 题，第 978 题，第 992 题，第 1004 题，第 1040 题，第 1052 题。
	left, right := 0, -1

	for left < len(s) {
		if right+1 < len(s) && freq[s[right+1]-'a'] == 0 {
			freq[s[right+1]-'a']++
			right++
		} else {
			freq[s[left]-'a']--
			left++
		}
		result = max(result, right-left+1)
	}
  • 滑动窗口经典题。第 239 题，第 480 题。
Title Solution Difficulty Time Space 收藏
3. Longest Substring Without Repeating Characters [Go]({{< relref "/ChapterFour/0003.Longest-Substring-Without-Repeating-Characters.md" >}}) Medium O(n) O(1) ❤️
76. Minimum Window Substring [Go]({{< relref "/ChapterFour/0076.Minimum-Window-Substring.md" >}}) Hard O(n) O(n) ❤️
239. Sliding Window Maximum [Go]({{< relref "/ChapterFour/0239.Sliding-Window-Maximum.md" >}}) Hard O(n * k) O(n) ❤️
424. Longest Repeating Character Replacement [Go]({{< relref "/ChapterFour/0424.Longest-Repeating-Character-Replacement.md" >}}) Medium O(n) O(1)
480. Sliding Window Median [Go]({{< relref "/ChapterFour/0480.Sliding-Window-Median.md" >}}) Hard O(n * log k) O(k) ❤️
567. Permutation in String [Go]({{< relref "/ChapterFour/0567.Permutation-in-String.md" >}}) Medium O(n) O(1) ❤️
978. Longest Turbulent Subarray [Go]({{< relref "/ChapterFour/0978.Longest-Turbulent-Subarray.md" >}}) Medium O(n) O(1) ❤️
992. Subarrays with K Different Integers [Go]({{< relref "/ChapterFour/0992.Subarrays-with-K-Different-Integers.md" >}}) Hard O(n) O(n) ❤️
995. Minimum Number of K Consecutive Bit Flips [Go]({{< relref "/ChapterFour/0995.Minimum-Number-of-K-Consecutive-Bit-Flips.md" >}}) Hard O(n) O(1) ❤️
1004. Max Consecutive Ones III [Go]({{< relref "/ChapterFour/1004.Max-Consecutive-Ones-III.md" >}}) Medium O(n) O(1)
1040. Moving Stones Until Consecutive II [Go]({{< relref "/ChapterFour/1040.Moving-Stones-Until-Consecutive-II.md" >}}) Medium O(n log n) O(1) ❤️
1052. Grumpy Bookstore Owner [Go]({{< relref "/ChapterFour/1052.Grumpy-Bookstore-Owner.md" >}}) Medium O(n log n) O(1)
1074. Number of Submatrices That Sum to Target [Go]({{< relref "/ChapterFour/1074.Number-of-Submatrices-That-Sum-to-Target.md" >}}) Hard O(n^3) O(n) ❤️
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