const Main = input => {
  const input2 = input.split('\n');
  const Asinfo = input2[0].split(' ');
  const Bsinfo = input2[1].split(' ');
  const diff = Number(Asinfo[1]) - Number(Bsinfo[1]);
  const fardiff = (Number(Bsinfo[0]) - Number(Asinfo[0]))
  if(Math.sign(Number(diff)) != 1 || Math.sign(fardiff) != 1) return console.log('NO');
  const sec = fardiff / Number(diff);
  if(sec >= Number(input2[2])){
    return console.log('NO');
  }
  console.log('YES')
}
Main(require("fs").readFileSync("/dev/stdin", "utf8"));