题解

```cpp
#include<bits/stdc++.h>
using namespace std;
int main(){
    int n ,m;
    int lst[6][6];
    for (int i = 1 ; i <= 5 ; i++){  //输入矩阵
        for (int j = 1 ; j <= 5 ; j++){
            cin >> lst[i][j];
        }
    }
    cin >> n >> m;
    swap(lst[n] ,lst[m]);  //交换
    for (int i = 1 ; i <= 5 ; i++){  //输出矩阵
        for (int j = 1 ; j <= 5 ; j++){
            cout << lst[i][j] << " ";
        }
        cout << "\n";
    }
    return 0;
}