题解

#include <iostream>
#include <iomanip> // for setw and setfill

using namespace std;

const int MAXN = 105;
int n, m;
int arr[MAXN][MAXN];
int num[MAXN];

int main() {
    cin >> n >> m;
    
    // 读取矩阵
    for (int i = 1; i <= n; ++i) {
        for (int j = 1; j <= m; ++j) {
            cin >> arr[i][j];
        }
    }
    
    // 读取新的行号顺序
    for (int i = 1; i <= n; ++i) {
        cin >> num[i];
    }
    
    // 按照新的行号顺序输出矩阵
    for (int i = 1; i <= n; ++i) {
        for (int j = 1; j <= m; ++j) {
            cout << setw(3) << setfill('0') << arr[num[i]][j] << " ";
        }
        cout << "\n";
    }
    
    return 0;
}