How to add logic and algorithm questions to online quizzes

How to add the logic and algorithm questions of the question in the online question answering, you need specific code examples

On the online question answering platform, there are many types of questions, among which logic and Algorithm questions are a very typical type. For this type of question, in addition to the text description of the question, specific solution algorithms and logic need to be given in the code. This article will introduce how to add such questions in online answering questions and give corresponding code examples.

1. Description of the topic

When designing logic and algorithm topics, you first need to clearly describe the topic. For example, we design a logic question. The description of the question is: "Given an integer array, determine whether there are two numbers in the array, and their sum is equal to the given target value. If these two numbers exist, return their array If these two numbers do not exist, an empty array will be returned." Such a question description can clearly express the question requirements and allow the answerer to understand the meaning of the question.

2. Code Implementation

Next, below the description of the topic, we give the corresponding code implementation. On the online question answering platform, programming languages ​​such as C and Java can be used to implement algorithms and logic. For example, for the above questions, you can use C language to write the solution code.

#include <iostream>
#include <vector>
#include <unordered_map>

using namespace std;

vector<int> twoSum(vector<int>& nums, int target) {
    unordered_map<int, int> map;
    vector<int> result;
    
    for (int i = 0; i < nums.size(); i++) {
        int complement = target - nums[i];
        if (map.find(complement) != map.end()) {
            result.push_back(map[complement]);
            result.push_back(i);
            return result;
        }
        map[nums[i]] = i;
    }
    
    return result;
}

int main() {
    vector<int> nums = {2, 7, 11, 15};
    int target = 9;
    vector<int> result = twoSum(nums, target);
    
    cout << "Result: ";
    for (int i = 0; i < result.size(); i++) {
        cout << result[i] << " ";
    }
    cout << endl;
    
    return 0;
}

In the above code, we define a twoSum function to determine whether the sum of two numbers is equal to the target value, and return the array subscripts of the two numbers. The specific implementation is to use an unordered_map to store the value and index of each element in the array. For each element, we first calculate the difference between the target value and the current element. If the difference exists in the map, two numbers are found, and their indices are added to the result array and returned. If the difference value does not exist in the map, put the current element into the map and continue searching. Finally, if no such two numbers are found, an empty array is returned.

3. Answer Verification

On the online question answering platform, answerers can run codes to verify whether their answers are correct. For the above question, in the main function, we generate a sample input, and then call the twoSum function to calculate and output the result array. Respondents can run the code, enter sample data, and see if the results are correct.

The above is the method of adding logic and algorithm questions to the online answer questions, as well as the corresponding code examples. When designing this type of questions, you need to pay attention to clear descriptions of the questions and give specific answer codes for the reference of the answerers. Through the online answering platform, answerers can run the code and verify the accuracy of their answers. This design method can help answerers better understand the question requirements and become familiar with the implementation process of algorithms and logic.

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