摘要：G2. Permutation Problem (Hard Version) This is the hard version of the problem. The only difference is that in this version $n \leq 5 \cdot 10^5$ and 阅读全文

摘要：G - AtCoder Tour Problem Statement AtCoder Land is represented by a grid with $H$ rows and $W$ columns. Let $(i, j)$ denote the cell at the $i$-th row 阅读全文

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