灰鲭鲨

摘要： Problem StatementThere are $N$ towns numbered $1,\ldots,N$ and $M$ roads numbered $1,\ldots,M$. Road $i$ connects towns $A_i$ and $B_i$. When you use 阅读全文

摘要： Problem Statement A hexagonal cell is represented as $(i,j)$ with two integers $i$ and $j$. Cell $(i,j)$ is adjacent to the following six cells: $(i-1 阅读全文