Помогите написать код на c++

 #include <iostream> 
#include <vector> 
#include <numeric> 
 
int main() { 
    std::vector<int> D = {3, 1, 4, 1, 5, 9, 2, 6, 5, 3, 5, 9, 7, 9, 3, 2, 3, 8, 4, 6, 2, 6, 4, 3, 3}; 
    int n = D.size(), totalSum = std::accumulate(D.begin(), D.end(), 0); 
    int maxSum = totalSum, maxIndex = 0, currentSum = totalSum; 
 
    for (int i = 1; i < n; ++i) { 
        currentSum = currentSum - D[i - 1] + D[i - 1]; 
        if (currentSum > maxSum) { 
            maxSum = currentSum; 
            maxIndex = i; 
        } 
    } 
 
    std::cout << "Массив: "; 
    for (int num : D) std::cout << num << " "; 
    std::cout << "\nЭлемент с максимальной суммой: " << D[maxIndex] << "\nНаибольшая сумма: " << maxSum << std::endl; 
    return 0; 
} 

 #include <array> 
#include <iostream> 
#include <random>

using namespace std;

size_t length(const char* prompt, size_t lim) { 
    size_t value = 0; 
    while (!value || lim < value) { 
        cout << prompt; 
        cin >> value; 
        cin.ignore(0x1000, '\n'); 
    } 
    return value; 
}

int main() { 
    constexpr size_t lim = 25; 
    array<int, lim> box{}; 
    const auto n = length("n: ", lim); 
    uniform_int_distribution<> uid(10, 99); 
    mt19937 gen{ random_device()() }; 
    for (size_t i = 0; i < n; ++i) { 
        box[i] = uid(gen); 
    } 
    if (1 == n) { 
        cout  
            << box[0] << '\n'  
            << box[0] << '\n'  
            << box[0] << '\n'; 
    } else if (2 == n) { 
        cout 
            << box[0] << ' ' << box[1] << '\n' 
            << box[0] << '\n' 
            << box[0] + box[1] << '\n'; 
    } else if (2 < n) { 
        const auto last = n - 1; 
        auto max = box[0] + box[last]; 
        auto target = last; 
        for (size_t i = 1; i < n; ++i) { 
            const auto pos = i - 1; 
            const auto sum = box[i] + box[pos]; 
            if (max < sum) { 
                max = sum; 
                target = pos; 
            } 
        } 
        cout << "array:"; 
        for (size_t i = 0; i < n; ++i) { 
            cout << ' ' << box[i]; 
        } 
        cout  
            << '\n' 
            << "element: " << box[target] << '\n' 
            << "sum: " << max << '\n'; 
    } 
}