第二次计数,同样声明一个长度为2001的int数组count2,如果count中的当前元素不等于0,就将当前元素作为count2数组的索引,元素值累加,加完后判断元素值是否大于等于2,如果大于,直接返回false。 publicbooleanuniqueOccurrences2(int[] arr){int[] count =newint[2001];for(intnum : arr) { count[num+1000]++; }...
https://leetcode-cn.com/problems/unique-number-of-occurrences/耗时解题:22 min 题解:4 min题意给你一个整数数组 arr,请你帮忙统计数组中每个数的出现次数。如果每个数的出现次数都是独一无二的,就返回 true;否则返回 false。思路两个哈希表,一个用来离散统计出现次数,第二个测试出现次数是否独一无二。
LeetCode.1207-唯一的元素出现次数(Unique Number of Occurrences) 这是小川的第419次更新,第452篇原创 看题和准备 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:...
Given an array of integersarr, write a function that returnstrueif 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] Output: true Explanation: The value 1 has 3 occurrences, 2 has 2 and 3 has 1. No two values ...
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] Output: true Explanation: The value 1 has 3 occurrences, 2 has 2 and 3 has 1. No two va...
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
0287-find-the-duplicate-number 0349-intersection-of-two-arrays 0442-find-all-duplicates-in-an-array 0448-find-all-numbers-disappeared-in-an-array 0540-single-element-in-a-sorted-array 0648-replace-words 1019-squares-of-a-sorted-array 1168-duplicate-zeros 1319-unique-number-of-occurrences 1449-...
#defineMAXN1010booluniqueOccurrences(int*arr,int arrSize){int count[MAXN*2];int count_count[MAXN*2];memset(count,0,sizeof(count));memset(count_count,0,sizeof(count_count));int i=0;for(;i<arrSize;i++){count[arr[i]+MAXN]++;}for(i=0;i<MAXN*2;i++){count_count[count[i]]+...
Ugly Number III 1202. Smallest String With Swaps 1207. Unique Number of Occurrences 1208. Get Equal Substrings Within Budget 1217. Play with Chips 1221. Split a String in Balanced Strings 1232. Check If It Is a Straight Line 1234. Replace the Substring for Balanced String 1235. Maximum ...
给你一个数组 arr ,请你将每个元素用它右边最大的元素替换,如果是最后一个元素,用 -1 替换。 完成所有替换操作后,请你返回这个数组。 示例1: 输入:arr = [17,18,5,4,6,1] 输出:[18,6,6,6,1,-1] 解释: - 下标 0 的元素 --> 右侧最大元素是下标 1 的元素 (18) ...