j,k,m,s,r;main(i){char*o;scanf("%d",&r);m=r+r-1;for(;i<r;i++){o=malloc(m);s=(m-i-i)/2;for(j=0;j<s+i+i-1;j++)o[j]=j<s?' ':'*';printf("%s\n",o);}o=malloc(m);for(;k<m/2-2;k++)o[k]=' ';printf("%sG*F\n",o);}
Note that non-ascii characters in the above source code will be escaped (such as \x9f).