灰鲭鲨

摘要： Problem StatementA sport event is held in June of every year whose remainder when divided by $4$ is $2$. Suppose that it is now January of the year $Y 阅读全文

摘要： Problem StatementThere is an empty sequence $X$ and an empty stack $S$. Also, you are given an integer sequence $A=(a_1,\ldots,a_N)$ of length $N$. Fo 阅读全文