#include <stdio.h>
int main(void){
    int a;
    int b;
    int c;
    double B;
    double C;

    scanf("%d %d %d",&a,&b,&c);
    
    if(a%b != 0){
        b = a / b + 1;
    }else{
        b = a / b;
    }

    if(a%c != 0){
        c = a / c + 1;
    }else{
        c = a / c;
    }

    //  check ok
    //  printf("%d %d\n",b,c);

    C = (double)c * 1.5;
    B = (double)b;
    //  check ok
    //  printf("%f %f\n",B,C);

    if(B == C){
        printf("YES\n");
    }else{
        printf("NO\n");
    }

    return 0;
}