灰鲭鲨

摘要： Problem StatementWe have a sequence of $N$ positive integers: $A_1,A_2,\cdots,A_N$. You are to rearrange these integers into another sequence $x_1,x_2 阅读全文

摘要： Problem StatementThere are $2N$ integers written on a blackboard. The $i$-th integer is $A_i$. Alice and Bob will play a game consisting of $N$ rounds 阅读全文