#include <iostream>
using namespace std;

const int N=30;

void print_matrix(int A[][N],int n,int m)
{
    for (int i=0;i<n;++i) {
        for (int j=0;j<m;++j)
            cout << A[i][j] << " ";
        cout << endl;
    }
    cout << endl;
}

int main()
{
    int A[N][N],i,j,lmax,lmin,cmax,cmin,max,min,n,m;

    cout << "n = ";
    cin >> n;

    cout << "m = ";
    cin >> m;

    for (i=0;i<n;++i)
        for (j=0;j<m;++j){
            cout << "A[" << i <<","<<j<<"]=";
            cin >> A[i][j];
        };

    print_matrix(A,n,m);

    lmax = lmin = cmax = cmin = 0;
    max = min = A[0][0];

    for (i=0;i<n;++i)
        for (j=0;j<m;++j) {
            if (A[i][j]>max) {
                max = A[i][j];
                lmax=i;
                cmax = j;
            }
            if (A[i][j]<min) {
                min = A[i][j];
                lmin = i;
                cmin = min;
            };
        };
    A[lmax][cmax]^=A[lmin][cmin]^=A[lmax][cmax]^=A[lmin][cmin];
    print_matrix(A,n,m);
    return 0;
}