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), (...
Given an array of integersnums, returnthe number ofgood pairs. A pair(i, j)is calledgoodifnums[i] == nums[j]andi<j. Example 1: Input:nums = [1,2,3,1,1,3]Output:4Explanation:There are 4 good pairs (0,3), (0,4), (3,4), (2,5) 0-indexed. ...
1publicintnumIdenticalPairs(int[] nums) {2if(nums ==null|| nums.length == 0) {3return0;4}56//key: int value; value: number of occurrence7Map<Integer, Integer> lookup =newHashMap<>();8intgoodPairsCount = 0;9for(inti : nums) {10if(lookup.containsKey(i)) {11goodPairsCount +=l...
AI代码解释 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...
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。
1512. Number of Good Pairs # 题目 # Given an array of integers nums. A pair (i,j) is called good if nums[i] == nums[j] and i < j. Return the number of good pairs. Example 1: Input: nums = [1,2,3,1,1,3] Output: 4 Explanation: There are 4 good pairs (0,3
Code示例: class Solution { public int numIdenticalPairs(int[] nums) { int ans = 0; Map<Integer, Integer> map = new HashMap<>(); for (int num : nums) { Integer freq = map.get(num); if (freq == null) { map.put(num, 1); } else { ans += freq; map.put(num, freq+1)...
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
Return the number of good leaf node pairs in the tree. Example 1: AI检测代码解析 Input: root = [1,2,3,null,4], distance = 3 Output: 1 Explanation: The leaf nodes of the tree are 3 and 4 and the length of the shortest path between them is 3. This is the only good pair. ...
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...