#include <bits/stdc++.h>

using namespace std;


typedef int32_t h_int32;
typedef int64_t h_int64;
typedef uint32_t uh_int32;
typedef uint64_t uh_int64;
typedef h_int64 h_int;

#define REP( i, n ) for(int i = 0; i < ( int )( n ); ++i )
#define REPR( i, n ) for(int i = ( int )( n ); i >= 0; --i)
#define FOR( i, a, n ) for(int i = ( int )( a ); i < ( int )( n ); ++i )
#define FORR( i, a, n ) for(int i = ( int )( n ); i >= ( int )( a ); --i)

#define VINIT( v, type, n )vector<type> v; v.resize( n );
#define VINIT2( v, type, n, a )vector<type> v; v.resize( n, a );
#define VCIN( v, type, n ) VINIT( v, type, n ) REP( i, n ) cin >> v[i];
#define ALL( x ) x.begin(), x.end()

#define DOUT( x ) cerr << #x << " = " << x << "\n"
#define COUT( x ) cout << ( x ) << "\n"



#define INF 999999999

signed main()
{
        ios::sync_with_stdio( false );
        cin.tie( 0 );
        int a, b, c;
        cin >> a >> b >> c;
        int x = ceil( ( double )a / ( double )b );
        int y = ceil( ( double )a / ( double )c );

        if( x / 3 * 2 >= y) COUT( "YES" );
        else COUT( "NO" );


        return 0;
}