#include <iostream>
using namespace std;
int main()
{int n,m;
cout<<"n=";cin>>n;
cout<<"m=";cin>>m;
int a[n][m];
for(int i=1;i<=n;i++)
for(int j=1;j<=n;j++)
{cout<<"a["<<i<<"]["<<j<<"]=";
cin>>a[i][j];}
for(int i=1;i<=n;i++)
for(int j=1;j<=n;j++)
if(a[i][j]==0)
a[i][j]=1;
for(int i=1;i<=n;i++)
{for(int j=1;j<=n;j++)
cout<<a[i][j]<<' ';
cout<<endl;}
return 0;
}