#include <iostream>
#include <fstream>

using namespace std;

int main()
{
    int a[100][100], n, m, l1, l2;
    ifstream f("date.in");
    f>>n;
    f>>m;
    for(int i=1; i<=n; i++)
    for(int j=1; j<=m; j++)
        f>>a[i][j];
    cout<<"linia1=";cin>>l1;
    cout<<"linia2=";cin>>l2;
    int aux=0;
    for(int i=1; i<=m; i++)
    {
        aux=a[l1][i];
        a[l1][i]=a[l2][i];
        a[l2][i]=aux;
    }
    for(int i=1; i<=n; i++)
    {
        for(int j=1; j<=m; j++)
        cout<<a[i][j]<<" ";
        cout<<endl;
    }
    return 0;
}

    cout << "Hello world!" << endl;
    return 0;
}