#include <iostream>
#include <time.h>
#include <stdlib.h>
#include <vector>

int main()
{
    srand(time(NULL));
    int m, n;
    int pos_col = 0;
    std::cout << "Enter the m and n in one string: " << std::endl;
    std::cin >> m >> n;
    std::vector< std::vector<double> > arr;
    arr.resize(m, std::vector<double>(n, 0));
    for (int i = 0; i < m; i++)
    {
        for (int j = 0; j < n; j++)
        {
            arr[i][j] = (rand() % 25) - 5;
        }
    }
    for (int i = 0; i < m; i++)
    {
        for (int j = 0; j < n; j++)
        {
            std::cout << arr[i][j] << " ";
        }
        std::cout << "\n";
    }
    for (int i = 1; i < m; i++)
    {
        bool positive = true;
        for (int j = 0; j < n; j++)
        {
            if (arr[i][j] < 0)
            {
                positive = false;
                break;
            }
        }
        if (positive)
        {
            pos_col = i;
        }
    }
    if (pos_col > 0)
    {
        for (int i = 0; i < m; i++)
        {
            double temp = arr[i][pos_col];
            arr[i][pos_col] = arr[i][0];
            arr[i][0] = temp;
        }
        std::cout << "After swapping: " << std::endl;
        for (int i = 0; i < m; i++)
        {
            for (int j = 0; j < n; j++)
            {
                std::cout << arr[i][j] << " ";
            }
            std::cout << "\n";
        }
    }
    else
        std::cout << "0";
    std::cout << "\n";
    std::cin.get();
    std::cin.get();
    return 0;
}