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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
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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
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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
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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
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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
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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
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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
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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
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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
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[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
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