2356.number_of_unique_subjects_taught_by_each_teacher 236.lowest_common_ancestor_of_a_binary_tree 2367.number_of_arithmetic_triplets 238.product_of_array_except_self 2390.removing_stars_from_a_string 242.valid_anagram 2441.largest_positive_integer_that_exists_with_its_negative 246.strobogrammatic...
404-sum-of-left-leaves 409-longest-palindrome 41-first-missing-positive 42-trapping-rain-water 435-non-overlapping-intervals 442-find-all-duplicates-in-an-array 445-add-two-numbers-ii 446-arithmetic-slices-ii-subsequence 451-sort-characters-by-frequency 452-minimum-number-of-arrows-to-burst-b...
题目 1512. Number of Good Pairs 解题方法 先构造计数字典,返回值rat,然后遍历字典根据其中每个数字的出现次数套用公式n(n-1)/2即可。 时间复杂度:O(n) 空间复杂度:O(n) 代码 classSolution:defnumIdenticalPairs(self,nums:List[int])->int:dic,rat=collections.Counter(nums),0forkey in dic.keys():ra...
This Repository contains, The Problems I Solved on Leetcode, GFG, Interviewbit etc, During the Journey to Improve My Problem Solving and Coding Ability, To become a Good Coder. - Problem-Solving/1072-flip-columns-for-maximum-number-of-equal-rows/NOTES.md
404-sum-of-left-leaves 409-longest-palindrome 41-first-missing-positive 42-trapping-rain-water 435-non-overlapping-intervals 442-find-all-duplicates-in-an-array 445-add-two-numbers-ii 446-arithmetic-slices-ii-subsequence 451-sort-characters-by-frequency 452-minimum-number-of-arrows-to-bur...