Programming VIP

Title 1525: Blue Bridge Cup algorithm to improve VIP prime time limit: 1Sec Memory limit: 128MB Submit: 2503 solve: 347 Title Description Given interval[L, R] ， Please calculate the number of primes in the interval. input Two numbers L and R. Data scale and agreement 2 < = L < = R < = 2147483647 R-L < = ...

1. Bubble sorting Bubble sorting principle: 1) Compare two adjacent elements. If the preceding element is larger than the following element, exchange the two numbers. After the first traversal, the maximum number will be placed at the last position of the array, that is, array[length - 1]. 2) The last element is skipped during the second trav ...

Intersection of two unidirectional linked lists Problem Description: There are two one-way linked lists. They may or may not intersect. If it intersects, it returns the intersecting node; if it does not intersect, it returns null. There are only three cases when two one-way linked lists intersect. The problem of linked list intersection is ...

1, Heap and related operations Heap structure is a complete binary tree structure implemented by array size refers to the number of nodes I position, left child 2i+1, right child 2i+2, parent node (i-1)/2 rounded downIn a complete binary tree, if the maximum value of each subtree is at the top, it is a large root heapIn a complete binary t ...

Let's take a look at the definition given by Du Niang: And look up the set. In some set application problems with N elements, we usually make each element form a single element set at the beginning, and then merge the sets of elements belonging to the same group in a certain order. In the meantime, we should repeatedly find out which set an ...

Implementation of stack and queue related algorithms In the process of learning data structure and algorithm, in order to better understand the implementation of the algorithm, this paper implements the algorithms of stack and queue in the course. This article only provides algorithm code reference. For detailed explanation of relevant algorit ...

1. What is a data structure 1.1 some definitions of data structure "A data structure is a data object and the various relationships between the instances of the object and the data elements that make up the instance. These relationships can be given by defining relevant functions." Sartaj Sahni, data structure, algorithm and App ...

Current topic 53. Maximum subarray and 918. Maximum sum of circular subarrays 152. Product maximum subarray 1567. Longest subarray length with positive product 53. Maximum subarray and The common feature of several topics in this issue is to find a continuous array in an array to maximize the goal. We start wit ...

Notice before reading Key points introduction and brief statement. The seventh computer question is be ing updated Topic content Problem description The main office and scientific research buildings of Beihang include new main building, Yifu Building, such as heart building, office building, library, main building, building 1, etc;. Be ...

1. Single valued binary tree – oj link Solution: 1. Judge whether the value of the left child of the root is the same as the root node. 2. Judge whether the value of the right child of the root is the same as the root node. 3. Judge whether the binary tree with the left child of the root as the root is a single valued binary tre ...