[LeetCode] 1429. First Unique Number You have a queue of integers, you need to retrieve the first unique integer in the queue. Implement theFirstUniqueclass: FirstUnique(int[] nums)Initializes the object with the numbers in the queue. int showFirstUnique()returns the value of the first un...
public: queue<int>q; unordered_map<int,int>cnt; FirstUnique(vector<int>&nums) { cnt.clear(); intlen=nums.size(); for(inti=0;i<len;i++){ q.push(nums[i]); cnt[nums[i]]++; } } intshowFirstUnique() { while(!q.empty()){ intnow=q.front(); if(cnt[now]>1)q.pop(); e...
今天介绍的是LeetCode算法题中Easy级别的第269题(顺位题号是1207)。给定一个整数数组arr,当且仅当该数组中每个元素的出现次数唯一时,返回true。 例如: 输入:arr = [1,2,2,1,1,3] 输出:true 说明:值1出现3次,值2出现2次,值3出现1次。没有两个值出现的次数相同。 输入:arr = [1,2] 输出:false 输...
Can you solve this real interview question? Unique Number of Occurrences - Given an array of integers arr, return true if the number of occurrences of each value in the array is unique or false otherwise. Example 1: Input: arr = [1,2,2,1,1,3] Outpu
[leetcode] 1207. Unique Number of Occurrences Description Given an array of integers arr, write a function that returns true if and only if the number of occurrences of each value in the array is unique. Example 1: Input: arr = [1,2,2,1,1,3]...
我们用 f[i][0] 和f[i][1] 分别表示使用字符串 binary 的第0,1,⋯,i 个字符,可以构造出的以 0/1 结尾的不同的好子序列的数目。由于「好子序列」不能包含前导 0,但本身可以为 0,那么我们可以规定「好子序列」必须以 1 开始并求出答案,如果 binary 中包含 0 就再对答案增加 1。这样做可以避免...
Return the number of 4-directional walks from the starting square to the ending square, that walk over every non-obstacle square exactly once. 所以不仅要递归,还要把所有能走的格子走一遍。 我们用todo变量表示剩下来要走的格点数量,当前位置和最终位置重合并且todo为0时增加一条结果。 class Solution {...
1. Description Least Number of Unique Integers after K Removals 2. Solution Version 1 classSolution:deffindLeastNumOfUniqueInts(self,arr,k):stat={}fornuminarr:stat[num]=stat.get(num,0)+1result=sorted(stat.items(),key=lambdaitem:item[1])whilek>0:k=k-result[0][1]ifk>=0:result.pop...
Return the number of different transformations among all words we have. Example: Input: words = ["gin", "zen", "gig", "msg"] Output: 2 Explanation: The transformation of each word is: "gin" -> "--...-." "zen" -> "--...-." ...
原文链接[每日 LeetCode] 929. Unique Email Addresses Description: Every email consists of a local name and a domain name, separated by the @ sign. For example, inalice@leetcode.com,aliceis the local name, andleetcode.comis the domain name. ...