#include #include int main(void){ int i, a, b, c, neednum, neednum2; scanf("%d %d %d", &a, &b, &c); neednum = (int)ceil((double)a / b); neednum2 = (int)ceil((double)a / c); if(neednum2*3<=neednum*2){ printf("YES\n"); }else{ printf("NO\n"); } return 0; }