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import java.io.*;
public class Csdn2 {
public static void main(String[] args) throws NumberFormatException, IOException {
InputStreamReader ir=new InputStreamReader(System.in);
BufferedReader br=new BufferedReader(ir);
System.out.println("please input a number");
int n;
n = Integer.parseInt(br.readLine());
System.out.println(n);
int[][] arrayOut=new int[n][n];
arrayOut[0][0]=1;
for(int row=0;row<n;row++){
for(int column=0;column<n;column++){
arrayOut[row][column]++;
}
}
//System.out.print(arrayOut);
for(int row=0;row<n;row++){
for(int column=0;column<n;column++){
System.out.print(arrayOut[row][column] + " ");
}
System.out.println();
}
}
}