/*#include <stdio.h>int main(){ int n, a, b=0, c, i, j; scanf("%d", &n); a=n; for(i=n; a>1; i--) { a=a-2; b=b+1; } for(i=b; i>=0; i--) { for(j=b; j>=1; j--) { printf(" "); } for(j=1; j<=n-(b*2); j++) { printf("*"); } b=b-1; printf("\n"); }}*/