import extensions;
import system'routines;
import system'collections;

public program()
{
    var n := console.write:"Enter the matrix size:".readLine().toInt();

    var identity := new Range(0, n).selectBy:(i => new Range(0,n).selectBy:(j => (i == j).iif(1,0) ).summarize(new ArrayList()))
                         .summarize(new ArrayList());

    identity.forEach:
        (row) { console.printLine(row.asEnumerable()) }
}