code/class/shu_zi_jv_xin.cpp

//数字矩形
#include<iostream>

using namespace std;

int main(){
    int n;
    cin >>n;

    for (int i = n-1; i < n; i++)
    {
        for (int i = 1; i <= n; i++)
        {
            cout <<"456"<<endl;
        }    
    }
    
    return 0;
}