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摘要： C2. Magnitude (Hard Version) The two versions of the problem are different. You may want to read both versions. You can make hacks only if both versio 阅读全文

摘要： F - Two Sequence Queries Problem Statement You are given sequences of length $N$, $A=(A_1,A_2,\ldots,A_N)$ and $B=(B_1,B_2,\ldots,B_N)$.You are also g 阅读全文

摘要： G. Yasya and the Mysterious Tree Yasya was walking in the forest and accidentally found a tree with $n$ vertices. A tree is a connected undirected gra 阅读全文

摘要： D. Invertible Bracket Sequences A regular bracket sequence is a bracket sequence that can be transformed into a correct arithmetic expression by inser 阅读全文

摘要： D. XORificator You are given a binary (consisting only of 0s and 1s) $n \times m$ matrix. You are also given a XORificator, using which you can invert 阅读全文

摘要： E. Chain Queries You are given a tree of $n$ vertices numbered from $1$ to $n$. Initially, all vertices are colored white or black. You are asked to p 阅读全文

摘要： F - MST Query Problem Statement You are given a weighted undirected connected graph $G$ with $N$ vertices and $N-1$ edges, where vertices are numbered 阅读全文

摘要： [USACO13DEC] Optimal Milking G 题目描述 Farmer John has recently purchased a new barn containing N milking machines (1 <= N <= 40,000), conveniently numbe 阅读全文

摘要： F. Cutting Game Alice and Bob were playing a game again. They have a grid of size $a \times b$ ($1 \le a, b \le 10^9$), on which there are $n$ chips, 阅读全文

摘要： Find Products of Elements of Big Array A powerful array for an integer x is the shortest sorted array of powers of two that sum up to x. For example, 阅读全文