#include<stdio.h>
int main(){
    int n,i,j;
    scanf("%d",&n);
    if(n<=0||n%2==0){
        printf("Invalid input");
        return 0;
    }    
    for(i=1;i<=n;i+=2){
        for(j=1;j<=i,j++)
        printf("%d",j);
        printf("\n");
    }
    for(i=n-2;i>=1;i-=2){
        for(j=1;j<=i;j++)
        printf("%d",j);
        printf("\n");
    }
    return 0;
}