Given an array of integers and an integer k, you need to find the number of unique k-diff pairs in the array. Here a k-diff pair is defined as an integer pair (i, j), where i and j are both numbers in the array and theirabsolute differenceis k. Example 1: Input: [3, 1, 4...
532.K-diff Pairs in an Array 解题思路。 1、读题,数组中二数之差的绝对值为k。 2、只要遍历数组,每一个元素加上K值,还在原来的数组中,就找到一个解。 3、如果用数组遍历,会超时,通不过LeetCode 的测试,变…
Can you solve this real interview question? Count Nice Pairs in an Array - You are given an array nums that consists of non-negative integers. Let us define rev(x) as the reverse of the non-negative integer x. For example, rev(123) = 321, and rev(120) =
Explanation: There are two 2-diff pairs in the array, (1, 3) and (3, 5). Although we have two 1s in the input, we should only return the number of unique pairs. Example 2: Input: nums = [1,2,3,4,5], k = 1 Output: 4 Explanation: There are four 1-diff pairs in the ar...
The integer n is in the range [1, 1000] and k is in the range [0, 1000]. 本题题意很简单,最直接的方法是就是使用DFS求全排列,然后作判断,但是想都不用想肯定会超时,所以肯定是使用DP来做的嘛, 参考链接:[LeetCode] K Inverse Pairs Array K个翻转对数组 ...
https://leetcode.com/problems/k-diff-pairs-in-an-array/ 题目描述 Given an array of integers and an integer k, you need to find the number of unique k-diff pairs in the array. Here a k-diff pair is defined as ...
Can you solve this real interview question? Divide Array Into Equal Pairs - You are given an integer array nums consisting of 2 * n integers. You need to divide nums into n pairs such that: * Each element belongs to exactly one pair. * The elements p
Explanation: The array [1,3,2] and [2,1,3] have exactly 1 inverse pair. Constraints: 1 <= n <= 1000 0 <= k <= 1000 题目描述: 给出两个整数 n 和 k,找出所有包含从 1 到 n 的数字,且恰好拥有 k 个逆序对的不同的数组的个数。
All the numbers in the input array are in the range of 32-bit integer. ReversePairs是LeetCode Weekly Contest 19的最后一题,很可惜没有做出来。这篇文章就是针对此类数组问题做出的总结。 解决复杂的数组类问题主要思想就是动态规划:将数组拆分,解决子问题。
1497. 检查数组对是否可以被 k 整除 - 给你一个整数数组 arr 和一个整数 k ,其中数组长度是偶数,值为 n 。 现在需要把数组恰好分成 n / 2 对,以使每对数字的和都能够被 k 整除。 如果存在这样的分法,请返回 true ;否则,返回 false。 示例 1: 输入:arr = [1,