There is a public bike service in Hangzhou City which provides great convenience to the tourists from all over the world. One may rent a bike at any s

Suppose that all the keys in a binary tree are distinct positive integers. Given the postorder and inorder traversal sequences, you are supposed to ou

Given two sets of integers, the similarity of the sets is defined to be /, where Nc is the number of distinct common numbers shared by the two sets, a

The basic task is simple: given N real numbers, you are supposed to calculate their average. But what makes it complicated is that some of the input n

Unlike in nowadays, the way that boys and girls expressing their feelings of love was quite subtle in the early years. When a boy A had a crush on a g

Sample Input: 6 6 7 01234 880 a1903 199 ydjh2 200 wehu8 300 dx86w 220 missing 400 ydhfu77 99 wehu8 55 ydjh2 98 dx86w 88 a1903 86 01234 39 ydhfu77 88 a

British astronomer Eddington liked to ride a bike. It is said that in order to show off his skill, he has even defined an "Eddington number", E -- tha

Recommendation system predicts the preference that a user would give to an item. Now you are asked to program a very simple recommendation system that

The "travelling salesman problem" asks the following question: "Given a list of cities and the distances between each pair of cities, what is the shor

此题题干略 Sample Input: 4 7 1001 3212 1003 1204 1005 1306 7797 9 9988 2333 1204 2006 2005 2004 2003 2302 2001 13 3011 3812 3013 3001 1306 3003 2333 3066 3