#include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define loop(i,a,b) for(int i=a;i pii; typedef vector vi; typedef vector vvi; typedef vector vp; typedef vector vvp; typedef vector vs; typedef vector vd; typedef vector vvd; typedef pair pip; typedef vectorvip; const double PI=acos(-1); const double EPS=1e-7; const int inf=1e8; const ll INF=1e16; int dx[4]={0,1,0,-1}; int dy[4]={1,0,-1,0}; int main(){ int a,b,c; cin>>a>>b>>c; int s=(a+b-1)/b; int t=(a+c-1)/c; if(s*2>=t*3)cout<<"YES"<