leetcode.com 2026-02-26
🟡1404.number-of-steps-to-reduce-a-number-in-binary-representation-to-one
🏷️ Tags
#bit_manipulation #string #simulation
🟡1404.number-of-steps-to-reduce-a-number-in-binary-representation-to-one
🏷️ Tags
#bit_manipulation #string #simulation
Telegraph
number-of-steps-to-reduce-a-number-in-binary-representation-to-one
Given the binary representation of an integer as a string s, return the number of steps to reduce it to 1 under the following rules:
leetcode.cn 2026-02-28
🟡1680.concatenation-of-consecutive-binary-numbers
🏷️ Tags
#bit_manipulation #math #simulation
🟡1680.concatenation-of-consecutive-binary-numbers
🏷️ Tags
#bit_manipulation #math #simulation
Telegraph
concatenation-of-consecutive-binary-numbers
给你一个整数 n ,请你将 1 到 n 的二进制表示连接起来,并返回连接结果对应的 十进制 数字对 109 + 7 取余的结果。 示例 1: 输入:n = 1 输出:1 解释:二进制的 "1" 对应着十进制的 1 。 示例 2: 输入:n = 3 输出:27 解释:二进制下,1,2 和 3 分别对应 "1" ,"10" 和 "11" 。 将它们依次连接,我们得到 "11011" ,对应着十进制的 27 。 示例 3: 输入:n = 12 输出:505379714 解释:连接结果为 "11011100…
leetcode.com 2026-02-28
🟡1680.concatenation-of-consecutive-binary-numbers
🏷️ Tags
#bit_manipulation #math #simulation
🟡1680.concatenation-of-consecutive-binary-numbers
🏷️ Tags
#bit_manipulation #math #simulation
Telegraph
concatenation-of-consecutive-binary-numbers
Given an integer n, return the decimal value of the binary string formed by concatenating the binary representations of 1 to n in order, modulo 109 + 7. Example 1: Input: n = 1 Output: 1 Explanation: "1" in binary corresponds to the decimal value 1. Example…
leetcode.cn 2026-05-20
🟡2657.find-the-prefix-common-array-of-two-arrays
🏷️ Tags
#bit_manipulation #array #hash_table
🟡2657.find-the-prefix-common-array-of-two-arrays
🏷️ Tags
#bit_manipulation #array #hash_table
Telegraph
find-the-prefix-common-array-of-two-arrays
给你两个下标从 0 开始长度为 n 的整数排列 A 和 B 。 A 和 B 的 前缀公共数组 定义为数组 C ,其中 C[i] 是数组 A 和 B 到下标为 i 之前公共元素的数目。 请你返回 A 和 B 的 前缀公共数组 。 如果一个长度为 n 的数组包含 1 到 n 的元素恰好一次,我们称这个数组是一个长度为 n 的 排列 。 示例 1: 输入:A = [1,3,2,4], B = [3,1,2,4] 输出:[0,2,3,4] 解释:i = 0:没有公共元素,所以 C[0] = 0 。 i = 1:1…
leetcode.com 2026-05-20
🟡2657.find-the-prefix-common-array-of-two-arrays
🏷️ Tags
#bit_manipulation #array #hash_table
🟡2657.find-the-prefix-common-array-of-two-arrays
🏷️ Tags
#bit_manipulation #array #hash_table
Telegraph
find-the-prefix-common-array-of-two-arrays
You are given two 0-indexed integer permutations A and B of length n. A prefix common array of A and B is an array C such that C[i] is equal to the count of numbers that are present at or before the index i in both A and B. Return the prefix common array…
leetcode.cn 2026-06-12
🔴3559.number-of-ways-to-assign-edge-weights-ii
🏷️ Tags
#bit_manipulation #tree #depth_first_search #array #math #dynamic_programming
🔴3559.number-of-ways-to-assign-edge-weights-ii
🏷️ Tags
#bit_manipulation #tree #depth_first_search #array #math #dynamic_programming
Telegraph
number-of-ways-to-assign-edge-weights-ii
给你一棵有 n 个节点的无向树,节点从 1 到 n 编号,树以节点 1 为根。树由一个长度为 n - 1 的二维整数数组 edges 表示,其中 edges[i] = [ui, vi] 表示在节点 ui 和 vi 之间有一条边。
leetcode.com 2026-06-12
🔴3559.number-of-ways-to-assign-edge-weights-ii
🏷️ Tags
#bit_manipulation #tree #depth_first_search #array #math #dynamic_programming
🔴3559.number-of-ways-to-assign-edge-weights-ii
🏷️ Tags
#bit_manipulation #tree #depth_first_search #array #math #dynamic_programming
Telegraph
number-of-ways-to-assign-edge-weights-ii
There is an undirected tree with n nodes labeled from 1 to n, rooted at node 1. The tree is represented by a 2D integer array edges of length n - 1, where edges[i] = [ui, vi] indicates that there is an edge between nodes ui and vi. Initially, all edges have…
leetcode.cn 2026-07-10
🔴3534.path-existence-queries-in-a-graph-ii
🏷️ Tags
#greedy #bit_manipulation #graph #array #two_pointers #binary_search #dynamic_programming #sorting
🔴3534.path-existence-queries-in-a-graph-ii
🏷️ Tags
#greedy #bit_manipulation #graph #array #two_pointers #binary_search #dynamic_programming #sorting
Telegraph
path-existence-queries-in-a-graph-ii
给你一个整数 n,表示图中的节点数量,这些节点按从 0 到 n - 1 编号。 同时给你一个长度为 n 的整数数组 nums,以及一个整数 maxDiff。 如果满足 |nums[i] - nums[j]| <= maxDiff(即 nums[i] 和 nums[j] 的 绝对差 至多为 maxDiff),则节点 i 和节点 j 之间存在一条 无向边 。 此外,给你一个二维整数数组 queries。对于每个 queries[i] = [ui, vi],找到节点 ui 和节点 vi 之间的 最短距离 。如果两节点之间不存在路径,则返回…