#include <stdio.h>

int main() {
    int n;
    printf("Enter size: ");
    scanf("%d", &n);
    
    for (int i = n; i >= 1; i--) {
        for (int j = 1; j <= n - i; j++) printf(" ");
        for (int k = 1; k <= 2 * i - 1; k++) printf("%d", i);
        printf("\n");
    }
    for (int i = 2; <= n; i++) {
        for (int j = 1; j <= n - i; j++) printf(" ");
        for (int k = 1; k <= 2 * i; k++) printf("%d", i);
        printf("\n");
    }
    return 0;
}