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Leetcode Daily Question
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Leetcode Daily Question
leetcode.cn
2025-12-02
🟡
3623.count-number-of-trapezoids-i
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Tags
#geometry
#array
#hash_table
#math
Telegraph
count-number-of-trapezoids-i
给你一个二维整数数组 points,其中 points[i] = [xi, yi] 表示第 i 个点在笛卡尔平面上的坐标。 水平梯形 是一种凸四边形,具有 至少一对 水平边(即平行于 x 轴的边)。两条直线平行当且仅当它们的斜率相同。 返回可以从 points 中任意选择四个不同点组成的 水平梯形 数量。 由于答案可能非常大,请返回结果对 109 + 7 取余数后的值。 示例 1: 输入: points = [[1,0],[2,0],[3,0],[2,2],[3,2]] 输出: 3 解释: 有三种不…
来源
答案
Leetcode Daily Question
leetcode.com
2025-12-02
🟡
3623.count-number-of-trapezoids-i
🏷️
Tags
#geometry
#array
#hash_table
#math
Telegraph
count-number-of-trapezoids-i
You are given a 2D integer array points, where points[i] = [xi, yi] represents the coordinates of the ith point on the Cartesian plane. A horizontal trapezoid is a convex quadrilateral with at least one pair of horizontal sides (i.e. parallel to the x-axis).…
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Solution
Leetcode Daily Question
leetcode.cn
2025-12-03
🔴
3625.count-number-of-trapezoids-ii
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Tags
#geometry
#array
#hash_table
#math
Telegraph
count-number-of-trapezoids-ii
给你一个二维整数数组 points,其中 points[i] = [xi, yi] 表示第 i 个点在笛卡尔平面上的坐标。
来源
答案
Leetcode Daily Question
leetcode.com
2025-12-03
🔴
3625.count-number-of-trapezoids-ii
🏷️
Tags
#geometry
#array
#hash_table
#math
Telegraph
count-number-of-trapezoids-ii
You are given a 2D integer array points where points[i] = [xi, yi] represents the coordinates of the ith point on the Cartesian plane. Return the number of unique trapezoids that can be formed by choosing any four distinct points from points. A trapezoid…
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Solution
Leetcode Daily Question
leetcode.cn
2025-12-09
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3583.count-special-triplets
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Tags
#array
#hash_table
#counting
Telegraph
count-special-triplets
给你一个整数数组 nums。 特殊三元组 定义为满足以下条件的下标三元组 (i, j, k):
来源
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Leetcode Daily Question
leetcode.com
2025-12-09
🟡
3583.count-special-triplets
🏷️
Tags
#array
#hash_table
#counting
Telegraph
count-special-triplets
You are given an integer array nums. A special triplet is defined as a triplet of indices (i, j, k) such that:
Source
Solution
Leetcode Daily Question
leetcode.cn
2025-12-11
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3531.count-covered-buildings
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Tags
#array
#hash_table
#sorting
Telegraph
count-covered-buildings
给你一个正整数 n,表示一个 n x n 的城市,同时给定一个二维数组 buildings,其中 buildings[i] = [x, y] 表示位于坐标 [x, y] 的一个 唯一 建筑。 如果一个建筑在四个方向(左、右、上、下)中每个方向上都至少存在一个建筑,则称该建筑 被覆盖 。 返回 被覆盖 的建筑数量。 示例 1: 输入: n = 3, buildings = [[1,2],[2,2],[3,2],[2,1],[2,3]] 输出: 1 解释:
来源
答案
Leetcode Daily Question
leetcode.com
2025-12-11
🟡
3531.count-covered-buildings
🏷️
Tags
#array
#hash_table
#sorting
Telegraph
count-covered-buildings
You are given a positive integer n, representing an n x n city. You are also given a 2D grid buildings, where buildings[i] = [x, y] denotes a unique building located at coordinates [x, y]. A building is covered if there is at least one building in all four…
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Solution
Leetcode Daily Question
leetcode.cn
2025-12-13
🟢
3606.coupon-code-validator
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Tags
#array
#hash_table
#string
#sorting
Telegraph
coupon-code-validator
给你三个长度为 n 的数组,分别描述 n 个优惠券的属性:code、businessLine 和 isActive。其中,第 i 个优惠券具有以下属性:
来源
答案
Leetcode Daily Question
leetcode.com
2025-12-13
🟢
3606.coupon-code-validator
🏷️
Tags
#array
#hash_table
#string
#sorting
Telegraph
coupon-code-validator
You are given three arrays of length n that describe the properties of n coupons: code, businessLine, and isActive. The ith coupon has:
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Solution