#include <stdio.h>

int main(){
    unsigned n, i, j, g1, g2=1;
    int inkrement=1;

    scanf("%u",&n);
    
    g1 = 2*n-1;
    for(i=0; i<g1; i++){
        for(j=0; j<g2; j++)
            printf("*");
        printf("\n");
        if(i==n-1) /* unutrasnja granica pocinje da se smanjuje na pola */
            inkrement=-1;
        g2+=inkrement;
    }
    
    return 0;
}