import std.stdio,
       std.conv,
       std.string,
       std.range,
       std.math,
       std.algorithm;

void main()
{
    auto a = readln.strip.to!real;
    auto b = readln.strip.to!real;
    auto c = readln.strip.to!real;

    ((a / b * 2 / 3).ceil >= (a / c).ceil ? "YES" : "NO").writeln;
}