#include <cstdio>

int main(){
    int a, b, c;
    scanf("%d %d %d", &a, &b, &c);

    int x = (a + b - 1) / b, y = (a + c - 1) / c;
    if(x * 2 >= y * 3){puts("YES");}
    else{puts("NO");}
}