LeetCode - Number of Good Pairs Given an array of integers nums. A pair (i,j) is called goodifnums[i] == nums[j] and i <j. Return the number of good pairs. Example1: Input: nums= [1,2,3,1,1,3] Output:4Explanation: There are4 good pairs (0,3), (0,4), (3,4), (...
Runtime:1 ms, faster than81.21%of Java online submissions for Number of Good Pairs. Memory Usage:39.7 MB, less than14.56%of Java online submissions for Number of Good Pairs. 整体表现不太好。只能说一般。
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...
1publicintnumIdenticalPairs(int[]nums){2if(nums==null||nums.length==0){3return0;4}56// key: int value; value: number of occurrence7Map<Integer,Integer>lookup=newHashMap<>();8int goodPairsCount=0;9for(int i:nums){10if(lookup.containsKey(i)){11goodPairsCount+=lookup.get(i);12look...
Can you solve this real interview question? Number of Good Pairs - Given an array of integers nums, return the number of good pairs. A pair (i, j) is called good if nums[i] == nums[j] and i < j. Example 1: Input: nums = [1,2,3,1,1,3] Output: 4 Exp
Can you solve this real interview question? Number of Good Leaf Nodes Pairs - You are given the root of a binary tree and an integer distance. A pair of two different leaf nodes of a binary tree is said to be good if the length of the shortest path betwe
class Solution { public int numOfPairs(String[] nums, String target) { int cnt=0; int n=nums.length; for (int i = 0; i < n-1; i++) { for (int j = i+1; j < n; j++) { String temp1=nums[i]+nums[j]; String temp2=nums[j]+nums[i]; if(target.equals(temp1)){ cnt...
1128. Number of Equivalent Domino Pairs solution1: 不明白为什么每个元素都要加上count; AI检测代码解析 class Solution { public: int numEquivDominoPairs(vector<vector<int>>& dominoes) { int res = 0; unordered_map<int, int> count; ...
题目链接: Count Number of Pairs With Absolute Difference K : leetcode.com/problems/c 差的绝对值为K 的数对数目: leetcode.cn/problems/co LeetCode 日更第 357 天,感谢阅读至此的你 欢迎点赞、收藏、在看鼓励支持小满 发布于 2023-01-14 21:38・上海 ...
pairs,数对; difference,差; absolute difference,差值的绝对值; absolute difference K,差值的绝对值=K。 题目:Given an integer arraynumsand an integerk, returnthe number of pairs(i, j)wherei < jsuch that|nums[i] - nums[j]| == k.