#include <stdio.h>
#include <stdlib.h>
int main(int argc,char*argv[]) {
    float x, y,a;
    for(y=1.5;y>-1.5;y-=0.1){
        for(x=-1.5;x<1.5;x+=0.05){
            a=x*x+y*y-1;
            putchar(a*a*a - x*x*y*y*y <= 0 ? '$' : ' ');
        }
        putchar('\n');
    }
    printf("\n");
    printf("生日快乐，天天开心\n");
    return 0;
}