脂环

摘要： You are given an array [𝑎1,𝑎2,…,𝑎𝑛][a1,a2,…,an] such that 1≤𝑎𝑖≤1091≤ai≤109. Let 𝑆S be the sum of all elements of the array 𝑎a. Let's call an a 阅读全文

摘要： You are playing a new computer game in which you have to fight monsters. In a dungeon you are trying to clear, you met three monsters; the first of th 阅读全文

摘要： 题目描述 现有n个砝码，重量分别为 a_ia**i，在去掉 mm 个砝码后，问最多能称量出多少不同的重量（不包括 00）。 请注意，砝码只能放在其中一边。 输入格式 第 11 行为有两个整数 nn 和 mm，用空格分隔。 第 22 行有 nn 个正整数 a_1, a_2, a_3,\ldots , 阅读全文

摘要： 链接：https://ac.nowcoder.com/acm/contest/9977/B 来源：牛客网 题目描述 牛牛有一个长和高都为为nn的网格三角形，牛牛想从从左下角点走到右上角点，但是牛牛只能向上或者向右沿着网格的边走，牛牛想知道从左下角点走到右上角点的方案数的奇偶性。牛牛现在给你nn，请你 阅读全文

摘要： In computer science, a binary tree is a rooted tree in which each node has at most two children. In this problem, let's denote 𝑛n as the number of no 阅读全文

摘要： Pang believes that one cannot make an omelet without breaking eggs. For a subset 𝐴A of {1,2,…,𝑛}{1,2,…,n}, we calculate the score of 𝐴A as follows: 阅读全文

摘要： 链接：https://ac.nowcoder.com/acm/contest/9925/D 来源：牛客网 题目描述 As a world-famous traveler, Prof. Pang's research interest is to travel as many places as po 阅读全文

摘要： 链接：https://ac.nowcoder.com/acm/contest/9925/M 来源：牛客网 题目描述 Your git project (you don't need to be familiar with git to solve this problem) has some fil 阅读全文

摘要： 链接：https://ac.nowcoder.com/acm/contest/9925/I 来源：牛客网 题目描述 Prof. Du and Prof. Pang plan to build a sky garden near the city of Allin. In the garden, th 阅读全文

摘要： Gildong has an interesting machine that has an array 𝑎a with 𝑛n integers. The machine supports two kinds of operations: Increase all elements of a s 阅读全文