onlyblues

摘要： B. Raspberries You are given an array of integers $a_1, a_2, \ldots, a_n$ and a number $k$ ($2 \leq k \leq 5$). In one operation, you can do the follo 阅读全文

摘要： C. Medium Design The array $a_1, a_2, \ldots, a_m$ is initially filled with zeroes. You are given $n$ pairwise distinct segments $1 \le l_i \le r_i \l 阅读全文

摘要： koishi的数学题 题目描述 Koishi 在 Flandre 的指导下成为了一名数学大师，她想了一道简单的数学题。 输入一个整数 $n$，设 $\displaystyle f(x) = \sum_{i=1}^n x \bmod i$，你需要输出 $f(1), f(2), \ldots , f(n 阅读全文

摘要： 统计子矩阵 给定一个 $N \times M$ 的矩阵 $A$，请你统计有多少个子矩阵 (最小 $1 \times 1$，最大 $N × M$) 满足子矩阵中所有数的和不超过给定的整数 $K$? 输入格式 第一行包含三个整数 $N, M$ 和 $K$。 之后 $N$ 行每行包含 $M$ 个整数，代表 阅读全文

摘要： [COCI2021-2022#6] Zemljište 题目描述 有一块地，大小为 $r \times s$，$\rm Matej$ 想买下它。这块地每个 $1\times1$ 的正方形都有不同的价格。 设一片非空子矩阵价格总和为 $m$，则这片子矩阵的权值为 $|m-a|+|m-b|$，您需要找到 阅读全文

摘要： D. Professor Higashikata Josuke is tired of his peaceful life in Morioh. Following in his nephew Jotaro's footsteps, he decides to study hard and beco 阅读全文

摘要： D. Monocarp and the Set Monocarp has $n$ numbers $1, 2, \dots, n$ and a set (initially empty). He adds his numbers to this set $n$ times in some order 阅读全文

摘要： Count of Sub-Multisets With Bounded Sum You are given a 0-indexed array nums of non-negative integers, and two integers l and r. Return the count of s 阅读全文

摘要： G. Anya and the Mysterious String Anya received a string $s$ of length $n$ brought from Rome. The string $s$ consists of lowercase Latin letters and a 阅读全文

摘要： C. Decreasing String Recall that string $a$ is lexicographically smaller than string $b$ if $a$ is a prefix of $b$ (and $a \ne b$), or there exists an 阅读全文