#include <iostream>
using namespace std;
template<class T>
T **init_a(int n){
        double **a=new double*[n];
        for (int i=0; i<n; i++) 
           a[i]=new double[n];
        for (int i=0; i<n;i++){
            for (int j=0;j<n;j++) {
             a[i][j]= (i==j)?1:0;
             }
         }
             return a;
             }  
template<class T>
void print_a(T **a, int n) {
     for (int i=0;i<n;i++){
         for (int j=0;j<n;j++){
         cout << a[i][j]<<"\t";
         }
         cout<< endl;
         }
}

int main (void) {
int n;
    cout<< "dose n;" ;
    cin>>n ; 
    
   double **a,**b,**c;
  a=init_a<double>(n);
  print_a<double>(a,n);
   return 0;
}