int n=s.nextInt();
System.out.println("1");
int i=2;
while(i<=n) {
int j=1;
int val=1;
while(j<=i) {
if(i%2==1)
System.out.print(val);
if(i%2==0)
System.out.print();
j++;
}
System.out.println();
i++;
val++;
}
}
}