由于随着右端点的增加圆肯定不断变大,所以右端点可以分成三段:[l,mid][l,mid]对应的圆完全包含[mid+1,r][mid+1,r]对应的圆,不存在包含关系和[l,mid][l,mid]对应的圆完全被[mid+1,r][mid+1,r]对应的圆包含,用 two pointers 维护三段分界点,左右两段显然可以O(1)O(1)求得,中间那段相当于要你维...
if (matrix.empty() || matrix[0].empty()) return; int m = matrix.size(); int n = matrix[0].size(); // Initialize pre_sum with the same dimensions as matrix pre_sum = vector<vector<int>>(m, vector<int>(n, 0)); // Calculate prefix sums pre_sum[0][0] = matrix[0][0];...
Surprisingly, the correction can be done in O(n/B⋅polylogn)O(n/B⋅polylogn) (which is not discovered by anyone before) by simply enumerating xx and yy as factors of numbers in a range between n±O(n/B)n±O(n/B), because traditionally we need xyz≤nxyz≤n, in contrast,...
2019-12-12 08:00 −原题链接在这里:https://leetcode.com/problems/range-sum-of-bst/ 题目: Given the root node of a binary search tree, return the sum of values of all nod... Dylan_Java_NYC 0 487 Codeforces Round #608 (Div. 2) D Portals ...
A subsequence of a string is a new string CodeForces - 894A-QAQ(思维) tears and "A" as a mouth. Now Diamond has given Bort a string consisting of only uppercase... to be consecutive, but the order of letters should be exact. Input The only line contains a string of...
Letdist(u,v)\mathrm{dist}(u, v)dist(u,v)be the number of edges in the unique simple path connecting verticesuuuandvvv. Letdiam(l,r)=maxdist(u,v)\mathrm{diam}(l, r) = \max \mathrm{dist}(u, v)diam(l,r)=maxdist(u,v)over all pairsu,vu, vu,vsuch thatl≤u,v≤rl ...
Your task is to replace the minimum number of elements (replacement is the following operation: choose some index ii from 11 to nn and replace aiai with some integer in range [1;k][1;k]) to satisfy the following conditions: after all replacements, all aiai are positive integers not greate...
http://www.lintcode.com/en/problem/submatrix-sum/?rand=true 请参阅 Range Sum Query 2D - Immutable...LintCode 406: Minimum Size Subarray Sum (同向双指针经典题!!!) Minimum Size Subarray Sum Given an array of n positive integers and a positive integer s, find the minimal length of a ...
The input will consist of a series of integers n, one integer per line. Output For each case, output SUM(n) in one line, followed by a blank line. You may assume the result will be in the range of 32-bit signed integer. Sample Input ...
[LeetCode] 304. Range Sum Query 2D - Immutable 2019-12-10 11:35 −Medium Given a 2D matrix matrix, find the sum of the elements inside the rectangle defined by its upper left corner (row1, col1) and lower ri... 程嘿嘿 0