摘要：
DescriptionOnce Bob took a paper stripe ofnsquares (the height of the stripe is 1 square). In each square he wrote an integer number, possibly negativ... 阅读全文
摘要：
DescriptionVanya walks late at night along a straight street of lengthl, lit bynlanterns. Consider the coordinate system with the beginning of the str... 阅读全文
摘要：
Descriptionbobo has a sequence a1,a2,…,an. He is allowed to swap twoadjacentnumbers for no more than k times.Find the minimum number of inversions aft... 阅读全文