2Sum算法如下:O(N) 所以3Sum只需进行O(N)次2Sum就行了,写个循环完成 Tip:数组题要是涉及到找数字,记得用hash法,用空间换时间 code: 1defthreeSum(self, nums):2"""3:type nums: List[int]4:rtype: List[List[int]]5"""6length =len(nums)7iflength < 3:8return[]9result =[]10nums.sort(...
char=s[right] window_counts[char]=window_counts.get(char,0)+1 ifcharindict_tandwindow_counts[char]==dict_t[char]: formed+=1 whileleft<=rightandformed==required: char=s[left] ifright-left+1<ans[0]: ans=(right-left+1,left,right) window_counts[char]-=1 ifcharindict_tandwindow_cou...
Leetcode是一个锻炼用代码解决问题的思维能力的初级平台,也是程序员们喜闻乐见的一个网站。递归是一种算法结构,即在函数中调用函数本身来解决问题;回溯是一种算法思想,即通过不同的尝试来生成问题的解;DFS是针对一类特定搜索问题的递归实现方法。虽然也有遍历回溯的概念,虽然DFS也可以通过模拟栈来非递归求解,但本文...
LeetCode1314https://leetcode.com/problems/matrix-block-sum/ LeetCode1343https://leetcode.com/problems/number-of-sub-arrays-of-size-k-and-average-greater-than-or-equal-to-threshold/ LeetCode1371https://leetcode.com/problems/find-the-longest-substring-containing-vowels-in-even-counts/ LeetCode14...
partition-to-k-equal-sum-subsets partitioning-into-minimum-number-of-deci-binary-numbers pascals-triangle-ii pascals-triangle path-sum-ii path-sum-iii path-sum path-with-minimum-effort paths-with-sum-lcci peak-index-in-a-mountain-array peeking-iterator percentage-of-letter-in-st...
1524.Number-of-Sub-arrays-With-Odd-Sum (M) 974.Subarray-Sums-Divisible-by-K (M) 1590.Make-Sum-Divisible-by-P (M+) 1658.Minimum-Operations-to-Reduce-X-to-Zero (M) 1371.Find-the-Longest-Substring-Containing-Vowels-in-Even-Counts (H-) 1542.Find-Longest-Awesome-Substring (H-) 1915....
1374 Generate a String With Characters That Have Odd Counts Rust 1379 Find a Corresponding Node of a Binary Tree ... Python 1380 Lucky Numbers in a Matrix Rust 1389 Create Target Array in the Given Order Rust 1395 Count Number of Teams Rust ...
Input: [1, 2, 3, 5] Output: false Explanation: The array cannot be partitioned into equal sum subsets. 【解答】要划分数组成两个部分,这两个部分各自的和相等。 其实这道题可以问 k 个部分,两个部分是一个强化了的条件。整个数组的和(sum)是可以很容易得到的,那么分成两个部分,每个部分的和(sum...
0693 Binary Number with Alternating Bits Go 59.4% Easy 0694 Number of Distinct Islands 56.0% Medium 0695 Max Area of Island Go 62.7% Medium 0696 Count Binary Substrings 56.0% Easy 0697 Degree of an Array Go 53.8% Easy 0698 Partition to K Equal Sum Subsets 44.9% Medium 0699 Fallin...
8. 1374 Generate a String With Characters That Have Odd Counts - Leetcode in G 03:10 9. 1374 Generate a String With Characters That Have Odd Counts - Leetcode in G 03:10 10. 1207 Unique Number of Occurrences -- Leetcode in Go - Hash 哈希 05:34 11. 1207 Unique Number of Occ...