Написать программу реализующую действия с элементами динамического массива

#include <iostream>
#include <iomanip>
#include <ctime>
 
int main()
{
    srand(time(0));
 
    unsigned n;
    std::cin >> n;
    int **arr = new int*[n];
    unsigned *maxByRowIndexes = new unsigned[n];
    unsigned *minByColIndexses = new unsigned[n];
 
    std::fill(minByColIndexses, minByColIndexses + n, 0);
    
    for (unsigned i = 0; i < n; ++i)
    {
        arr[i] = new int[n];
        maxByRowIndexes[i] = 0;
        for (unsigned j = 0; j < n; ++j)
        {
            std::cout << std::setw(5) << (arr[i][j] = rand() % 101 - 50);
            if (arr[i][j] > arr[i][maxByRowIndexes[i]])
                maxByRowIndexes[i] = j;
            if (arr[i][j] < arr[minByColIndexses[j]][j])
                minByColIndexses[j] = i;
        }
        std::cout << std::endl;
    }
    std::cout << std::endl;
 
    std::cout << "maxims: ";
    for (unsigned i = 0; i < n; ++i)
        std::cout << std::setw(5) << arr[i][maxByRowIndexes[i]];
    std::cout << std::endl;
 
    std::cout << "minims: ";
    for (unsigned i = 0; i < n; ++i)
        std::cout << std::setw(5) << arr[minByColIndexses[i]][i];
    std::cout << std::endl;
 
    for (unsigned i = 0; i < n; ++i)
    {
        int tmp = arr[i][maxByRowIndexes[i]];
        arr[i][maxByRowIndexes[i]] = arr[minByColIndexses[i]][i];
        arr[minByColIndexses[i]][i] = tmp;
    }
 
    delete[] minByColIndexses;
    delete[] maxByRowIndexes;
 
    for (unsigned i = 0; i < n; ++i)
    {
            for (unsigned j = 0; j < n; ++j)
                std::cout << std::setw(5) << arr[i][j];
            delete[] arr[i];
        std::cout << std::endl;
    }
    delete[] arr;
 
    return 0;
}