onlyblues

摘要： Difference Between Maximum and Minimum Price Sum There exists an undirected and initially unrooted tree with $n$ nodes indexed from $0$ to $n - 1$. Yo 阅读全文

摘要： D. Friendly Spiders Mars is home to an unusual species of spiders — Binary spiders. Right now, Martian scientists are observing a colony of $n$ spider 阅读全文

摘要： C. Interesting Sequence Petya and his friend, robot Petya++, like to solve exciting math problems. One day Petya++ came up with the numbers $n$ and $x 阅读全文

摘要： 最大价值 已知，小写字母 $a \sim z$ 的价值分别为 $w_a,w_b, \ldots, w_z$。 对于一个由小写字母构成的长度为 $l$ 的字符串 $S=s_{1} s_{2} \ldots s_{l}$，其价值为 $w_{s1} \times 1 + w_{s2} \times 2 + 阅读全文

摘要： B. Gardener and the Array The gardener Kazimir Kazimirovich has an array of $n$ integers $c_1, c_2, \dots, c_n$. He wants to check if there are two di 阅读全文

摘要： 等差数列 给定一个长度为 $n$ 的正整数数列 $a_1,a_2, \ldots, a_n$ 和一个正整数 $k$。 你可以对数列进行以下两种操作： + i x ，增加操作，将 $a_i$ 的值增加 $x$（$x \geq 1$）。- i x ，减少操作，将 $a_i$ 的值减少 $x$（$x \g 阅读全文

摘要： Maximize the Minimum Powered City You are given a 0-indexed integer array stations of length $n$, where stations[i] represents the number of power sta 阅读全文

摘要： Number of Great Partitions You are given an array nums consisting of positive integers and an integer k . Partition the array into two ordered groups  阅读全文

摘要： Count Pairs With XOR in a Range Given a (0-indexed) integer array nums and two integers low and high , return the number of nice pairs. A nice pair is 阅读全文

摘要： Maximum Number of Points From Grid Queries You are given an $m \times n$ integer matrix grid and an array queries of size $k$. Find an array answer of 阅读全文