onlyblues

摘要： G. Moving Platforms There is a game where you need to move through a labyrinth. The labyrinth consists of $n$ platforms, connected by $m$ passages. Ea 阅读全文

摘要： F - Breakdown Problem Statement You are given a simple undirected graph consisting of $N$ vertices and $M$ edges. For $i = 1, 2, \ldots, M$, the $i$-t 阅读全文

摘要： Minimize OR of Remaining Elements Using Operations You are given a 0-indexed integer array nums and an integer k. In one operation, you can pick any i 阅读全文

摘要： 小苯的逆序对 题目描述 小苯有一个长度为 $n$ 的排列 $p$。他很想知道这个排列中有多少个逆序对满足互素。 形式化的，有多少个满足 $(i<j)$ 且 $(a_i > a_j)$ 且 $gcd(a_i, a_j) = 1$ 的 $(i, j)$ 对。 输入描述: 输入包含两行。 第一行一个正整数 阅读全文

摘要： D. Sasha and a Walk in the City Sasha wants to take a walk with his girlfriend in the city. The city consists of $n$ intersections, numbered from $1$ 阅读全文

摘要： 数组成鸡 题目描述 小鸡有一个由整数组成的数组，小鸡可以对这个数组进行任意次（可以不进行）全数组每个数加一或全数组每个数减一的操作。 现在，小鸡想让你回答 $Q$ 次询问，每次询问给出一个整数 $M$，你需要回答任意次（可以不操作）操作后是否可以使得给定数组的乘积等于给出的整数 $M$。 输入描述: 阅读全文

摘要： G. One-Dimensional Puzzle You have a one-dimensional puzzle, all the elements of which need to be put in one row, connecting with each other. All the 阅读全文

摘要： D. Lonely Mountain Dungeons Once, the people, elves, dwarves, and other inhabitants of Middle-earth gathered to reclaim the treasures stolen from them 阅读全文

摘要： E. Space Harbour There are $n$ points numbered $1$ to $n$ on a straight line. Initially, there are $m$ harbours. The $i$-th harbour is at point $X_i$ 阅读全文

摘要： E. Klever Permutation You are given two integers $n$ and $k$ ($k \le n$), where $k$ is even. A permutation of length $n$ is an array consisting of $n$ 阅读全文