#include <iostream>
#include <cstring>
#include <algorithm>

//上课写的二维数组入门
using namespace std;

int main()
{
    int arr[3][4] = {
        {0,1,2,3},
        {1,1,2,3},
        {2,1,2,3}
    };
    for (int i = 0; i < 3; i ++ ){
        for (int j = 0; j < 4; j ++ ){
            cout << arr[i][j] << " ";
        }
        cout << endl;
    }
    return 0;
}