10 2023 档案

摘要:构造矩阵 我们希望构造一个 $n \times m$ 的整数矩阵。 构造出的矩阵需满足: 每一行上的所有元素之积均等于 $k$。 每一列上的所有元素之积均等于 $k$。 保证 $k$ 为 $1$ 或 $-1$。 请你计算,一共可以构成出多少种不同的满足条件的矩阵。 由于结果可能很大,你只需要输出对 阅读全文
posted @ 2023-10-30 08:52 onlyblues 阅读(56) 评论(0) 推荐(0)
摘要:D. Counting Rhyme You are given an array of integers $a_1, a_2, \ldots, a_n$. A pair of integers $(i, j)$, such that $1 \le i < j \le n$, is called go 阅读全文
posted @ 2023-10-29 20:23 onlyblues 阅读(123) 评论(1) 推荐(1)
摘要:D. Doremy's Connecting Plan Doremy lives in a country consisting of $n$ cities numbered from $1$ to $n$, with $a_i$ people living in the $i$-th city. 阅读全文
posted @ 2023-10-29 19:37 onlyblues 阅读(66) 评论(0) 推荐(0)
摘要:E. Segment Sum You are given two integers $l$ and $r$ ($l \le r$). Your task is to calculate the sum of numbers from $l$ to $r$ (including $l$ and $r$ 阅读全文
posted @ 2023-10-25 20:47 onlyblues 阅读(67) 评论(0) 推荐(0)
摘要:E. Time Travel Berland is a country with ancient history, where roads were built and destroyed for centuries. It is known that there always were $n$ c 阅读全文
posted @ 2023-10-24 18:40 onlyblues 阅读(103) 评论(0) 推荐(0)
摘要:Minimum Changes to Make K Semi-palindromes Given a string s and an integer k, partition s into k substrings such that the sum of the number of letter 阅读全文
posted @ 2023-10-24 16:16 onlyblues 阅读(35) 评论(0) 推荐(0)
摘要:D2. Dances (Hard Version) This is the hard version of the problem. The only difference is that in this version $m \leq 10^9$. You are given two arrays 阅读全文
posted @ 2023-10-23 23:56 onlyblues 阅读(74) 评论(0) 推荐(0)
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
posted @ 2023-10-23 19:34 onlyblues 阅读(24) 评论(0) 推荐(0)
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
posted @ 2023-10-23 17:28 onlyblues 阅读(182) 评论(0) 推荐(0)
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
posted @ 2023-10-21 14:21 onlyblues 阅读(22) 评论(0) 推荐(0)
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
posted @ 2023-10-20 10:04 onlyblues 阅读(81) 评论(0) 推荐(0)
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
posted @ 2023-10-20 09:26 onlyblues 阅读(31) 评论(0) 推荐(0)
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
posted @ 2023-10-18 14:55 onlyblues 阅读(31) 评论(0) 推荐(0)
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
posted @ 2023-10-17 16:48 onlyblues 阅读(67) 评论(0) 推荐(0)
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
posted @ 2023-10-15 18:08 onlyblues 阅读(105) 评论(0) 推荐(0)
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
posted @ 2023-10-14 14:51 onlyblues 阅读(119) 评论(0) 推荐(2)
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
posted @ 2023-10-13 23:07 onlyblues 阅读(70) 评论(0) 推荐(0)
摘要:G. ABBC or BACB You are given a string $s$ made up of characters $\texttt{A}$ and $\texttt{B}$. Initially you have no coins. You can perform two types 阅读全文
posted @ 2023-10-12 14:32 onlyblues 阅读(93) 评论(0) 推荐(0)
摘要:C. Card Game There are $n$ cards stacked in a deck. Initially, $a_{i}$ is written on the $i$-th card from the top. The value written on a card does no 阅读全文
posted @ 2023-10-10 17:01 onlyblues 阅读(68) 评论(0) 推荐(0)
摘要:D. Sum of XOR Functions You are given an array $a$ of length $n$ consisting of non-negative integers. You have to calculate the value of $\sum_{l=1}^{ 阅读全文
posted @ 2023-10-09 14:52 onlyblues 阅读(91) 评论(0) 推荐(0)
摘要:D. Effects of Anti Pimples Chaneka has an array $[a_1,a_2,\ldots,a_n]$. Initially, all elements are white. Chaneka will choose one or more different i 阅读全文
posted @ 2023-10-09 11:38 onlyblues 阅读(33) 评论(0) 推荐(0)
摘要:D. Prefix Purchase You have an array $a$ of size $n$, initially filled with zeros ($a_1 = a_2 = \ldots = a_n = 0$). You also have an array of integers 阅读全文
posted @ 2023-10-07 15:06 onlyblues 阅读(45) 评论(0) 推荐(0)
摘要:Python缩进 在 Python 中,代码块没有显式的开始/结束或大括号来标记代码块的开始和结束。 相反,代码块是通过缩进定义的。 我们考虑一个极其简化的 Python 子集,其只有两种类型的语句:简单语句和 $For$ 语句。 简单语句(Simple statements)仅占一行,每行一个。 阅读全文
posted @ 2023-10-06 15:12 onlyblues 阅读(50) 评论(0) 推荐(0)

Web Analytics