#include <iostream>



using namespace std;

int n,m,i,j,lp,lu,minp,minu, v[50][50];

int main()

{

    cin >> n >> m;

    for (i=0; i<n; ++i)

        for (j=0; j<m; ++j)

            cin >> v[i][j];



    minp=v[0][0]; lp=0;

    for (i=1; i<n; ++i)

        if (v[i][0]<minp)

    {

        minp=v[i][0]; lp=i;

    }



    minu=v[0][m-1]; lu=0;

    for (i=1; i<n; ++i)

        if (v[i][m-1]<minu)

    {

        minu=v[i][m-1]; lu=i;

    }



    int t=v[lp][0];

    v[lp][0]=v[lu][m-1];

    v[lu][m-1]=t;



    for (i=0; i<n; ++i)

    {

        for (j=0; j<m; ++j)

            cout << v[i][j] << " ";

        cout << "\n";

    }

}

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