[题解]CF1800B Count the Number of Pairs 题意 给定一个字符串 SS,你可以进行 kk 次操作,每次操作你可以选定一个 ii,并将 SiSi 的大小写转换。 求:操作后,最多有几组配对的字符。(配对的定义是:对于一个字符,如果有大写,有小写被称之为一组。例如:A 和a 为一组。) 思路 你在读入的时候,你预处理...
Given an one-indexed array withnnpairwise distinct elements, find the number of pairs(l,r)(l,r)(1≤l≤r≤n1≤l≤r≤n) such that the inversion number of(a[l],a[l+1],...,a[r])(a[l],a[l+1],...,a[r])is odd.(a[l],a[l+1],...,a[r])(a[l],a[l+1],...,...
Kristina has a string s of length n, consisting only of lowercase and uppercase Latin letters. For each pair of lowercase letter and its matching uppercase letter, Kristina can get 1 burl. However, pairs of characters cannot overlap, so each character can only be in one pair. For example,...
You are given n circles centered on Y-aixs. The ith circle’s center is at point (i, 0) and its radius is A[i]. Count the number of pairs of circles that have at least one common point? Input The input should be a list of n positive integers A, each of them should be less ...
count number,计数; 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. ...
Given an array of N positive integers. Count the number of pairs whose sum exists in the given array. While repeating pairs will not be counted again. And we can’t make a pair using same position element. Eg : (2, 1) and (1, 2) will be considered as only one pair. ...
Number of pairs having sum 15 is: 2 Dry run We keep going left for the first BST and keep pushing them into the stack1. On the other hand, we keep going right for the second BST and keep pushing them into the stack2. After doing this we have: ...
The pair (2, 3) is a bad pair since 3 - 2 != 3 - 3, 1 != 0. There are a total of 5 bad pairs, so we return 5. Example 2: Input: nums = [1,2,3,4,5] Output: 0 Explanation: There are no bad pairs. Constraints: ...
To recite numbers in turn, as when dividing people or things into groups :The 24 children counted off by twos, forming a dozen pairs. count on 1.To rely on; depend on:You can count on my help. 2.To be confident of; anticipate:counted on getting a raise. ...
9. It was a root pairs of strains of holly, higher than the eaves, leaves dense seamless, dark green light, in the winter, with bamboo light green color of show scenery, giving a good impression to leave, it will enable you germinal Prose The inspiration, though not as earth-shattering...