#include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include using namespace std; inline bool cheak(int x, int y, int xMax, int yMax){ return x >= 0 && y >= 0 && xMax > x && yMax > y; } inline int toInt(string s) { int v; istringstream sin(s); sin >> v; return v; } template inline string toString(T x) { ostringstream sout; sout << x; return sout.str(); } template inline T sqr(T x) { return x*x; } typedef pair P; typedef tuple T; typedef long long ll; typedef unsigned long long ull; #define For(i,a,b) for(int (i) = (a);i < (b);(i)++) #define rep(i,n) For(i,0,n) #define clr(a) memset((a), 0 ,sizeof(a)) #define mclr(a) memset((a), -1 ,sizeof(a)) #define all(a) (a).begin(),(a).end() #define sz(a) (sizeof(a)) #define Fill(a,v) fill((int*)a,(int*)(a+(sz(a)/sz(*(a)))),v) const int dx[8] = { 1, 0, -1, 0, 1, 1, -1, -1 }, dy[8] = { 0, -1, 0, 1, -1, 1, -1, 1 }; const int mod = 1000000007; const int INF = 1e9; int main() { ll a, b, c; cin >> a >> b >> c; int at = 0,bt = 0; int ac = 0, bc = 0; while (a > at){ at += b; ac++; } while (a > bt){ bt += c; bc++; } cout << (((bc * 1.5) <= ac) ? "YES" : "NO" )<< endl; return 0; }